UPDATE 8:40 PM, with more names from family members:
Spencer C. Duncan, 21, of Kansas, said the AP, via the Kansas City Star.
Matt Mills, 36, petty officer first class, a central Texas native, according to TV station KVUE.
Tommy Ratzlaff, 35, of Green Forest, Ark., according to KY3, a Springfield, Mo. TV station.
Jason Workman, 32, petty officer first class, of Blanding, Utah, according to the Deseret News.
the Wall Street Journal offers an account of the fighting that led to the tragedy and what the ramifications might be.
Though the military has yet to release an official list of the dead, more victims are being identified by loved ones:
John Brown, a tech sergeant and native of Siloam Springs, Ark., according to Virginia TV station WTKR.
Chris Campbell, a Jacksonville, NC native, according to the Jacksonville Daily News.
Patrick Hamburger, of the Nebraska Air National Guard, according to the Omaha World-Herald.
Michael Strange, a petty officer from Mayfair, PA, according to Philadelphia TV station WPVI.
Kraig Vickers, 36, of the Navy Bomb Disposal Team, said the Maui News.
Others who previously are: Aaron Carson Vaughn from Tennessee, Jon Tumilson of Rockford, Iowa, Chief Petty Officer Robert James Reeves, 32, and Lt. Commander Jonas Kelsall.
The International Security Assistance Force Joint Command also issued a statement on the losses.
More news on what happened:
The mission, which the AP, via the Washington Post, is calling an aid operation for Army Rangers under attack.
Area where the troops died is known as a Taliban stronghold, reports the Miami Herald.