British Prime Minister David Cameron said at a London press conference Monday that a British aid worker may have been killed during an American rescue attempt by a U.S. grenade.The American command in Afghanistan originally announced that Linda Norgrove, 36, was killed by her Taliban captors.

The recent developments came to light after a U.S. led review found that her death may have been the result of a grenade detonated by American's during their rescue raid. However, it is still not certain whether or not this was how Norgrove wase even killed. Cameron said that "a full U.S./U.K. investigation will now be launched.”

Norgrove was captured Sept. 26, 2009 by the Taliban in the eastern Afghanistan province of Kunar.

Read more about Cameron's press conference and the recent developments here.