Aug 28 (Reuters) - Following are security developments in Afghanistan at 1430 GMT on Thursday:

* denotes new or updated items.

* HELMAND - Afghan and U.S.-led coalition forces killed more than 100 militants in the southern Afghan province of Helmand in the past three days of fighting, the U.S. military said.

ZABUL - Afghan and international forces killed or wounded 18 insurgents in Arghandab district of southern Zabul province, the Defence Ministry said in a statement.

HELMAND - Afghan soldiers killed 10 insurgents after coming under attack in Helmand's Girishk district on Wednesday, the Defence Ministry said.

HELMAND - Afghan soldiers inflicted heavy casualties during fierce fighting with insurgents in Nad Ali district, the Defence Ministry said in a statement. One soldier was killed and another wounded in the fighting.

SOUTHERN AFGHANISTAN - An international coalition soldier was killed while on patrol in southern Afghanistan on Wednesday, the U.S. military said in a statement. They did not release his nationality or other details.

PAKTIKA - Coalition forces killed one militant in the southeastern province of Paktika on Wednesday after he attacked the soldiers, the U.S. military said in a statement.

* KABUL - The NATO force signed an agreement with the Afghan Ministry of Defence handing over security responsibility for the capital, Kabul, to Afghan security forces, the Defence Ministry said in a statement. (Compiled by Jonathon Burch; Editing by Paul Tait)

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