exhaustive list of news media sources (please add more) 

there should be lots and lots, russian, english, fox news, indymedia, whatever, put it all in  
http://www.kavkazcenter.com/eng/content/2005/10/13/4146.shtml " Units of the Caucasus Front enter Nalchik " (arguably highly POV but still a news source) 13 Oct 2005
http://www.izvestia.ru/conflict/article2874892 "ПОДВЕРГНУТЬ ЛИКВИДАЦИИ" (date?)
http://gzt.ru/society/2005/10/16/221057.html "Напишите правду" (16.10.2005)
http://old.lenta.ru/news/2005/10/24/kudaev/ "В Нальчике арестован бывший заключенный Гуантанамо" (24.10.05)
...

list of unsourced facts in article (please add more)
on such a controvertial issue, every statement needs one or more sources.  it's ok to use a source many times.  when one of these gets sourced, strike it out like this, don't delete.  2005 Paris Suburb Riots provides a pretty good example.  After I do some research of my own, I'm going to start taking out unsourced facts, but not before 24 hours have passed unless I find a well-sourced  contradictory claim. 
"a large group of militants" how big, says who?
"A number of buildings associated with the Russian security forces were targeted"
"At least 136 people were reported killed" reported by whom?
"The attackers were said to be a mixture of rebels... from nearby Chechnya" kavkaz center report doesn't mention chechnya, only "units from other sectors of the Caucasian Front".
"The rebels/terrorists attacked a wide range of targets in the city, reportedly including three police stations, Nalchik airport, the regional headquarters of the Interior Ministry and Federal Security Service, the regional headquarters of the Russian penitentiary system and a border guards' office. Civilians were targeted as well: there were also bystanders shot in the street and hostages taken at a souvenir shop.  The fighting lasted for about four hours with heavy weapons and explosives being used by both sides. A few of the rebels/terrorists survived the initial fighting by taking refuge in city centre buildings and taking hostages, but were killed by Russian forces the following day." totally unsourced.  seems to be taken from the kavkaz center report
"The Russian government sent 1,500 regular troops and 500 Special Forces troops to Nalchik to regain government control of the city."
"Chechen warlord Shamil Basayev subsequently claimed responsibility for the attack in a statement posted on Kavkaz Center...Basaeyev claimed that Russian security forces had been tipped off some 5 days before the attack, which resulted in increased security in Nalchik."
Paragraph: "The Russian government and ... civilians in the city."
Paragraph: "There was also an uncertainty ... set of targets."