FACTBOX-Security developments in Afghanistan, August 6

August 6 (Reuters) - Following are security developments in Afghanistan reported as of 0845 GMT on Wednesday:

* denotes new or updated item

HERAT - A soldier from U.S.-led coalition forces died of wounds received in a roadside bomb in western Herat province, the U.S. military said on Wednesday.

FARAH - In neighbouring Farah, the Afghan national army killed four Taliban militants on Wednesday, the defence ministry said.

MAIDAN WARDAK - Insurgents ambushed soldiers from NATO-led forces on a road in Maidan Wardak province on Tuesday, the alliance said, and a suicide car bomber hit a vehicle of the force during the attack. There were no alliance casualties from either incident, the alliance said.

KAPISA - U.S.-led coalition forces killed several insurgents in an operation on Tuesday in Kapisa province which lies to the northeast of Kabul, the U.S. military said.

* HELMAND - Taliban insurgents have suffered "heavy casualties" in a clash with Afghan troops in southern Helmand province during the past 24 hours, the defence ministry said in a statement. It did not give any figure, adding the clash occurred after the insurgents ambushed the troops. Two government soldiers were wounded, it said.

The Taliban could not be reached immediately for comment. (Compiled by Sayed Salahuddin; Editing by Jerry Norton)