KABUL: The Taliban are claiming responsibility for what may have been the latest insider attack against Western troops.    

They say one of their infiltrators killed two American service members in Uruzgan province.

A statement Friday said an Afghan soldier shot the men a day earlier, and then escaped to join the insurgents.

A spokeswoman for US forces in Afghanistan said authorities were still determining whether the attacker was a member of the Afghan security forces or an insurgent who donned a government uniform.

It was the second suspected insider attack in two days. On Wednesday, two British troops and an Afghan policeman were gunned down in Helmand province.

The spate of insider attacks has further undermined public support for the 11-year war in Nato countries and increased calls for earlier withdrawals.