April 17 (Reuters) - Following are security developments in Iraq as of 1700 GMT on Tuesday:

* denotes new or updated item.

* BAGHDAD - U.S. troops killed three militants after their armoured vehicle was hit by an explosively formed projectile and they came under small arms fire in the southwestern Baghdad district of Qadissiya. RAMADI - Seventeen decomposed bodies were found in a deserted school in Ramadi 110 km (68 miles) west of Baghdad, police said.

MOSUL - Nine bodies were found in different parts of Mosul, 390 km (240 miles) north of Baghdad, morgue sources said.

NEAR MOSUL - A suicide bomber driving a tanker targeting a police patrol east of Mosul killed one civilian and wounded four Iraqi soldiers, police said.

HAWIJA - A car bomb targeting a police patrol killed three people, including one policeman, and wounded four others near a petrol station in the town of Hawija, north of Baghdad, police said.

FALLUJA - A U.S. Marine died in a non-hostile shooting incident during combat operations in western Anbar province on Monday, the U.S. military said. It said it was investigating the incident.

MOSUL - Gunmen wounded a tribal leader and killed his son in the northern city of Mosul, police said.

BAGHDAD - The bodies of 11 people were found shot in different districts of Baghdad, police said.

DIWANIYA - The bodies of four men, including three policemen, were found shot in and near the city of Diwaniya, 180 km (110 miles) south of Baghdad, police said.

BAGHDAD - Gunmen killed a university professor in al-Saidiya district in southern Baghdad, police said.

MOSUL - Gunmen killed police Brigadier Abdul Kareem al-Bijari with two of his guards in Mosul, 390 km north of Baghdad, police said.

NEAR SUWAYRA - The bodies of three men, two shot and the third decapitated, were retrieved from a river near the town of Suwayra, 40 km (25 miles) south of Baghdad, police said.

BAGHDAD - A mortar round landed in a residential district in southern Baghdad, killing one person and wounding three others on Monday, police said.

KIRKUK - A roadside bomb targeting a police patrol wounded a policeman and two civilians in the oil city of Kirkuk, 250 km (150 miles) north of Baghdad, police said.

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