user: Problem: Emergency services were called to a fire at the property in the city's Park Avenue at about 07:00.
A cordon was set up while police, fire crews and ambulances attended the scene. It is thought about 10 people were evacuated from the block.
The identities of the two who died have not yet been released.
Downstairs neighbour Sean Rowan, 25, who raised the alarm, said: "I heard creaking coming from the ceiling, I thought someone had possibly left the tap on.
"It was only when I got up and turned on the light in my room that I saw a big black spot on the ceiling with white smoke coming from it.
"I called 999 and they told me to get my flatmate and anyone else out of the flat immediately.
"I asked on the phone whether I should go and knock on the door upstairs and they said no just get straight outside."
Henry Stewart, 70, who has lived in the building for 23 years, said news of his neighbours' deaths was "tragic".
He said: "I kept looking out of the window and I saw this youngish guy laid out on the pavement and the paramedics and fire engine boys were working on him giving him CPR.
"I knew when I saw the guy, I knew he wouldn't make it."
What was that article about?

A: A man and a woman have died following a fire in a top-floor tenement flat in Dundee.


Who Viewed Your Profile-InstaAgent had topped the free app charts in several countries including the UK.
But on Tuesday, another developer posted evidence that it was copying people's Instagram usernames and passwords and sending them to an unknown server.
He said these were used to post spam to people's Instagram accounts.
Apple and Google both declined to comment.
The BBC obtained contact details for the app's creator, who registered the product under the name Turker Bayram.
However, the person who answered the Turkish phone number said he had poor English, did not reply to questions and walked away from the call.
The photo-sharing app Instagram is owned by Facebook. It's thought that hundreds of thousands of its accounts had been compromised.
Instagram told the BBC: "These types of third-party apps violate our platform guidelines and are likely an attempt to get access to a user's accounts in an inappropriate way. We advise against installing third-party apps like these. Anyone who has downloaded this app should delete it and change their password."
To confuse matters, there is another app available for iOS by a different Philadelphia-based developer, which is also called InstaAgent.
It remains available for download, although at least one review suggests people are confusing it with the pulled product.
"I wasn't aware of another app with a similar name until I started receiving support requests for behaviour that's impossible for my app to produce," Craig Pearlman told the BBC.
"It's especially troubling given the scrutiny iOS apps are subjected to before being approved for the App Store. I may need to consider renaming mine now."

Sum: A popular app has been pulled from Apple and Google's stores after being accused of stealing users' passwords.


Q: Since independence from France in 1960, Gabon has had just three presidents. Late President Omar Bongo ruled for more than four decades until his death in 2009.
During Omar Bongo's rule, Gabon maintained a close relationship with France under a system known as "Francafrique", receiving both political and military support in exchange for business favours.
But relations have cooled since his son Ali won a contested election in 2009 and French authorities launched a long-running corruption investigation into the family's assets.
Gabon is a major oil producer but a third of its population live in poverty, according to the World Bank.
Population 1.5 million
Area 267,667 sq km (103,347 sq miles)
Languages French, Bantu-group languages
Religion Christianity
Life expectancy 62 years (men), 64 years (women)
Currency CFA (Communaute Financiere Africaine) franc
President: Ali Ben Bongo Ondimba
Ali Bongo was sworn in for a second seven-year term in September 2016, after Gabon's constitutional court upheld his narrow victory in a bitterly disputed election.
Main rival Jean Ping described the court's decision as a "miscarriage of justice" amid opposition claims of vote fraud.
Mr Bongo took over from his late father Omar Bongo, who ruled Gabon for 41 years until his death in 2009.
He has pledged to address some of the issues that have fuelled anger among the country's 1.8 million people, like youth unemployment and over-reliance on falling oil revenues
But his presidency has been overshadowed by a long-running French investigation into allegations of embezzlement involving the Bongo family's assets.
Born in 1959 in Brazzaville, Congo where his father was serving in the armed forces, Mr Bongo was educated in France.
Gabon's main broadcast media are government-controlled.
In 2013, Reporters Without Borders acknowledged the authorities had made some progress in media freedom but said journalists still faced "police brutality and intimidation by officials". The watchdog called for an overhaul of the country's 2001 media law.
There were more than 670,000 internet users out of a population of 1.5 million by November 2015. (Internetworldstats.com).
Some key dates in Gabon's history:
14th-19th century - European settlers: Arrival of Portuguese slave traders, followed by French, Dutch and British.
1839 - France signs treaties with Gabonese coastal chiefs. Local Mpongwe ruler signs away sovereignty to the French.
1910 - Gabon becomes one of four territories making up French Equatorial Africa.
1958 - Gabon votes to become autonomous republic in the French Community.
1960 - Gabon declares independence.
1967 - Omar Bongo becomes president after the death Leon Mba.
1967-2009 - Omar Bongo dominates Gabonese politics, serving seven consecutive terms.
1990s - Multi-party political system introduced.
2003 - Constitution amended to repeal term limits, ensuring President Bongo holds the presidency for life.
2009 - Death of Omar Bongo, succeeded by his son Ali Ben Bongo Ondimba.

A: Gabon, located on the west coast of Africa, is one of the region's more stable countries.


Text: South Wales fire service said its crews had been called to 67 grass fires since Friday - 62 of them deliberate.
They include two separate incidents at Tylorstown, Rhondda Cynon Taff, at 05:30 and 05:45 BST on Monday.
The Mid and West service tackled a 40 hectare fire at Gorseinon and another at Kilvey Hill, Swansea.
Police closed the A484 as a result of the Gorseinon fire but the road has now reopened.
The North Wales service was dealing with some small fires.
A spokesman for North Wales Fire and Rescue Service said it was monitoring the mountain at Llantysilio, Denbighshire, after fire broke out.
He said crews from Llangollen, Denbigh and Wrexham had been there since 15:50 on Sunday.
They were tackling two "flame fronts".
He said one of the fronts was 700m across (2,300ft) and moving in a northerly direction, while the other was 200m (650ft) and moving towards gorse.
The Mid and West service's Deputy Chief Fire Officer Mick Crennell, who also chairs the All Wales Strategic Arson Reduction Board, said: "Arson and deliberate fires can put the lives of emergency services personnel and members of communities at risk.
"It is a crime that can carry heavy fines or even a prison sentence."
He said a new Wales Arson Reduction Strategy had been developed to help "re-focus efforts" and "broaden the responsibility of communities for arson reduction activity".
"Our aim is to encourage a cultural shift across Wales so that arson is seen as socially unacceptable by all," he added.
summary:

assistant: Fire crews across Wales have been continuing to tackle grass fires following a busy weekend.