US occupation forces have raided a mosque in the Iraqi capital of Baghdad, arresting two people. According to Aljazeera's correspondent, the 14th of Ramadan mosque near al-Firdaus square in Baghdad, was surrounded by US military vehicles. The identities of those arrested are not yet known. Earlier on Saturday, a bomb apparently aimed at a US patrol exploded in central Baghdad and police said an Iraqi civilian had been wounded. Small-arms fire crackled after the explosion, which went off in a narrow street near the St Raphael hospital. "According to our information, American vehicles were passing by. The bomb went off and then they fired," an Iraqi policeman told Reuters at the scene. Witnesses said the bomb had been placed under a pile of bricks across the street from a pharmacy. The US military said it was checking on the cause of the explosion at about 8 a.m. (04:00 GMT) in Baghdad's morning rush hour. **PHOTO CAPTION*** US troops surrounded the mosque before storming it. (Al-Jazeera)