July 7 (Reuters) - Following are security developments in Afghanistan at 1300 GMT on Tuesday.

* denotes new or updated item.

* WESTERN AFGHANISTAN - A U.S. soldier was killed in a bomb attack on a military convoy in western Afghanistan, U.S. forces said in a statement. No other details were available.

FARAH - An Afghan soldier shot dead two employees of the National Directorate of Security in Farah City in western Afghanistan, provincial governor Rohul Amin said. No other details were available.

FARAH - An unidentified gunman killed an official from the province's anti-terrorism police office, Amin said.

KHOST - A grenade attack on a police convoy killed one Afghan civilian and wounded 34, including four policemen, in the eastern province of Khost, said Kochai Nasseri, a spokesman for the provincial governor.

ZABUL - Two Canadians and a Briton were among three soldiers killed in a helicopter crash in the southern province of Zabul on Monday, a spokesman for the International Security Assistance Force (ISAF) in Afghanistan said. Two Canadians were also injured. The helicopter crashed on takeoff, ISAF said. (Compiled by Golnar Motevalli; Editing by Paul Tait)

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