FACTBOX: Security developments in Afghanistan, Sept 30

(Reuters) - Following are security developments in Afghanistan reported as of 1430 GMT on Saturday:

WARDAK - An Afghan soldier opened fire on sleeping U.S. troops at a joint base after a night operation, killing two American soldiers and wounding four, said Shahedullah Shahed, spokesman for the governor of Wardak province, west of Kabul. U.S. forces said only that two service members had died after a "hostile attack" and gave no further details.

EASTERN AFGHANISTAN - One U.S. service member was killed by a homemade bomb in eastern Afghanistan on Friday, the U.S. military said. It gave no further details.

KUNDUZ - A bomb in a motorcycle killed three people and wounded 20 in the Imam Saheb district of Kunduz province in the north of the country, provincial governor Mohammad Omar said.

LASHKAR GAH - Afghan police were holding a South African security guard who shot dead an Afghan employee of his firm, working on a U.S. anti-drugs programme in Helmand province in the south of the country, said Asadullah Sherzad, provincial police chief.

(Compiled by Peter Graff)