Iraqi security officials say an explosives-packed motorcycle blew up in Baghdad Thursday, killing at least four people and wounding nearly 20 others.
Police say the blast occurred in the Shorja market area of central Baghdad.
On Wednesday, the U.S. military said Iraqi and American troops killed at least 30 insurgents and detained 27 suspects during fierce fighting in city's the Haifa Street region, known as a Sunni Arab stronghold
In another operation in Baghdad, the U.S. military says troops detained 10 terrorists after witnesses reported seeing men loading weapons into a car. They also seized four weapons caches.
And the U.S. military says an American soldier was killed in a Baghdad operation Wednesday.
Separately, the U.S. military announced the deaths of two Marines killed Tuesday in combat operations in al-Anbar province, west of the capital.
Some information for this report was provided by AFP, AP and Reuters.