Developments in Iraq on May 13

May 13 (Reuters) - Following are security developments in Iraq on Saturday as of 1430 GMT.

Iraq is trying to form a government of national unity to combat a mostly Sunni Arab insurgency. Sectarian tensions have been running high since the bombing of a Shi'ite shrine in Samarra in February, which unleashed a wave of reprisal attacks.

Asterisk denotes a new or updated entry.

*RAMADI - U.S. forces clashed with insurgents in central Ramadi, witnesses said. A doctor said seven people were treated for wounds at the main hospital.

MOSUL - Gunmen ambushed and killed two policemen and wounded two others in the city of Mosul, 390 km (240 miles) north of Baghdad, police said. Two civilians were wounded.

BAGHDAD - Three policemen and three civilians were wounded when a roadside bomb exploded near their patrol in eastern Baghdad, police said.

BAGHDAD - A U.S. soldier was killed when his vehicle was struck by a roadside bomb in south Baghdad, a U.S. military statement said.

BAGHDAD - An Iraqi soldier was killed on Friday in a clash between two Iraqi army units in the town of Dhuluiya, north of Baghdad, which prompted intervention by U.S. forces, the U.S. military said on Saturday. Iraqi police and army officials denied any such confrontation happened.

POLITICAL DEVELOPMENTS

*BASRA - The governor said he suspended the police chief for failing to ensure security. Observers said the move may reflect a political struggle for control of security in the city.

*HILLA - An aide to the police chief said he would resist a bid by the provincial council to force him to quit.

*BAGHDAD - The Iraqi Foreign Ministry said an Arab League-sponsored national reconciliation conference would take place in Baghdad on June 11-12 or June 21-22. Arab League chief Amr Moussa said in Cairo it would be on June 20.