Iraqi security officials say a suicide car bomber has killed at least two people and wounded at least four others in western Baghdad.
Officials say the bomber rammed his explosives-filled car into an Iraqi army vehicle in the capital's Mansur district Thursday.
Earlier, the U.S. military announced it had detained 30 suspected militants during three days of operations targeting al-Qaida in Iraq.
A military statement says coalition troops detained 10 people - including the alleged leader of a bombing network - in the Tigris River valley, north of Baghdad.
Authorities arrested the other suspects around Baghdad and in the cities of Fallujah and Mosul.
In another development, Kuwait announced it plans to name an ambassador to Iraq soon, citing improved security conditions in the neighboring country.
Kuwait's decision comes shortly after the United Arab Emirates named its own ambassador to Iraq.
Jordan and Bahrain have also recently announced plans to appoint ambassadors to Baghdad.
The United States has been urging Sunni-ruled Arab states to forgive Iraq's debt and establish high-level diplomatic representation to the Shi'ite-led government in Baghdad.
Some information for this report was provided by AFP and Reuters.