Kabul, Feb 10 (TIWN) Two US troopers were killed when a suspect in an "Afghan uniform" opened fire on the combined American and Afghani force in Nangarhar province, a top official said.

A member of the Nangarhar Provincial Council, Ajmal Omer, said the gunman was killed.

There have been numerous attacks by Afghan national army soldiers on their allied partners over the 18 years of Afghanistan’s protracted war.

An Afghan defence ministry official, who was not identified because he was not authorised to speak to the media, said the shooter was an Afghan soldier who had argued with the US forces before opening fire. He was not a Taliban infiltrator, the official said.