KABUL, Afghanistan — An aid worker who was previously employed by the U.S. Army was shot dead in her Kabul apartment building on Sunday night, officials said. 
 
 Lisa Akbari, a dual U.S.-Afghan citizen had been living in the Karte Char area of the Afghan capital for three years, a senior police official said on condition of anonymity as he was not authorized to speak to journalists on the matter. Interior Ministry spokesman Sediq Sediqqi also later confirmed that Akbari had been fatally shot. 
 
 “ God got back his angel and is proud of you for all that you’ve done on Earth” 
 
 According to her LinkedIn profile, Akbari was a research manager for the U.S. Army from 2009 - 2013. She subsequently worked for aid agencies in Afghanistan including World Vision. 
 
 The U.S. Embassy confirmed Akbari's death on Monday but declined to comment on the circumstances. 
 
 "We offer our sincerest condolences to her family and loved ones on their loss," the U.S. Embassy official said. "We are providing all possible consular assistance." 
 
 A suspect was detained about 2.5 miles away from the scene of the attack. He was taken to hospital to be treated for injuries sustained during his arrest and had yet to be questioned early Monday. 
 
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 The victim's sister Mayana Aliah Akbari paid tribute to her "beautiful" sibling on Facebook. 
 
 "R.I.P. to my beautiful older sister Lisa. You were taken soon and very suddenly while in Afghanistan and this just feels like a living nightmare," she wrote. "I know God got back his angel and is proud of you for all that you've done on Earth while you were still living. I promise the psychopath that killed you will have justice served to him." 
 
 According to the slain woman's LinkedIn profile, Akbari studied at UNLV, the University of Wyoming and the Chicago School of Professional Psychology. 
 
 The senior police official told NBC News that Afghanistan's NDS intelligence agency was now leading the investigation and had confiscated personal items from the suspect's apartment. ||||| Image copyright AFP Image caption Helmand Province has seen fierce fighting between Afghan forces and the Taliban 
 
 Afghan police battling the Taliban in Helmand province say militants have laid siege to the police headquarters and supplies of ammunition are low. 
 
 Mohammad Dawood, police commander of Sangin district, said his officers had been surrounded, and, without urgent help, risked being "captured alive". 
 
 Helmand has seen fierce clashes in recent months, with large areas of the province being held by the Taliban. 
 
 Officials there have warned the whole of the southern province could fall. 
 
 In eastern Afghanistan, a suicide bomb attack on a US-Afghan patrol near Bagram airbase, in Parwan province, has killed five coalition soldiers, Reuters news agency reports. 
 
 Nato officials said the patrol had been targeted by an improvised device carried by a vehicle. 
 
 In a separate incident, the US embassy said a US citizen had been killed in the capital Kabul. Police told the BBC that a mullah killed Lisa Akbari while she was attending a local gym. The mullah has been arrested. 
 
 'No food' 
 
 Helmand province is a key Taliban base and an area of opium cultivation - the province has seen some of the fiercest clashes between Nato-led forces and the Taliban. 
 
 More than 450 UK military personnel died during a 13-year combat mission in Afghanistan, including more than 100 in Sangin. 
 
 UK forces ended combat operations in October last year. 
 
 Police Commander Mohammad Dawood told the BBC's Mahfouz Zubaide via satellite phone: "The situation is very harsh... We haven't eaten for the past two days. If we don't get support in the next hour or so, our fighters will be captured alive." 
 
 "For the past two days we have been surrounded inside the police headquarters. No one can move out because the checkpoints along the roads are gone. 
 
 "We only have the police HQ under our control and have a battalion of the national army with us. The district office and the intelligence directorate are under enemy control." 
 
 A spokesman for the Helmand governor told the BBC that special forces had been deployed to the area. 
 
 Afghanistan's Chief Executive Abdullah Abdullah held an emergency meeting with security ministers and pledged "immediate action" against the Taliban. 
 
 The Taliban have also come close to overrunning the neighbouring district of Gereshk, according to local media reports. Gereshk is strategically placed on the country's main circular highway. 
 
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 Earlier, the deputy governor of Helmand complained of a lack of government support in an open letter on Facebook to President Ashraf Ghani. 
 
 Mohammad Jan Rasoulyar warned that the province could fall to the Taliban. 
 
 He said at least 90 soldiers had been killed in the latest fighting and claimed Mr Ghani's entourage was not telling him the reality of the situation. 
 
 "Helmand will collapse to the enemies and it's not like Kunduz, where we could launch an operation from the airport to retake it. That is just impossible and a dream," he said. 
 
 Muhammad Kareem Atal, the head of Helmand's provincial council, said in quotes carried by AP that about "65% of Helmand is now under Taliban control... in every district either we are stepping back or we are handing territory over to Taliban". 
 
 In recent months, Taliban insurgents have launched multiple offensives, stretching the Afghan army, which is short of reinforcements, fuel and ammunition.
– An American woman was shot to death in Kabul on Sunday night, though the details surrounding her killing remain unclear, reports NBC News. The victim is Lisa Akbari, a veteran of the US Army who became an aid worker upon leaving the military in 2013. She has dual US-Afghan citizenship, reports NBC. A male suspect has been detained. The BBC reports that police say a "mullah" killed Akbari while she was at a gym in her Kabul neighborhood, but little more was known. "We offer our sincerest condolences to her family and loved ones on their loss," says the US Embassy, confirming the death. Akbari's sister paid homage to her "beautiful older sister" on Facebook. "I promise the psychopath that killed you will have justice served to him," writes Mayana Aliah Akbari.