[cnn-photo-caption image=http://i2.cdn.turner.com/cnn/2009/WORLD/meast/05/11/iraq.violence/art.camp.liberty.navy.jpg caption="U.S. Army troops get a safety briefing before departing Camp Liberty, Iraq, in December 2008."]
Program Note: Tune in tonight to hear more on the shooting in Iraq on AC360° at 10 p.m. ET.
A U.S. service member in Baghdad opened fire on his fellow troops Monday, killing five people - including some U.S. service members - according to two senior defense officials.
The shooter is in custody, the officials said.
Three others were wounded in the incident which happened at 2 p.m. at the U.S. military base, Camp Liberty, in Baghdad, the officials said.
The U.S. military is not officially releasing details about the nationalities of the victims, or exactly how they died.
"The only thing we know at this time is five coalition force members were killed in the shooting," Maj. Jose Lopez, the senior press officer with Multi-National Forces Baghdad, said.
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