A roadside bomb in Baghdad has killed three US soldiers and wounded two on a late-night combat patrol.
The soldiers were killed when the blast hit their military combat patrol in northern Baghdad, the US military said.
The three deaths raised to 46 the number of US troops who have died this month. At least 2,934 US soldiers have died since the war started in March 2003.
Elsewhere, a suicide car bomb today hit an abandoned house being used by policemen as an outpost in Dora, southern Baghdad, killing one policeman and wounding five, a police officer said.
Less than an hour later, a roadside bomb exploded near Mustasiriyah University in east Baghdad, wounding seven nearby civilians.
A college was also attacked in western Baghdad this morning, when a car bomb detonated near al-Maamoun college, killing one student and wounding two others and two policemen.
Last week, Prime Minister Nouri Maliki urged university professors and students to ignore a Sunni Arab insurgent group's warnings to avoid class.
The group had sent e-mails to students and posted signs at schools and mosques in Baghdad, saying students should stay away while it cleanses the campuses of Shia death squads, according to a statement from Mr Maliki's office.
AP