2 US Consulate staff members among 4 killed in convoy attack in Nigeria

Two staff members of the U.S. Consulate in Nigeria were among the four people killed by armed assailants when an American convoy was attacked on Tuesday, the State Department said.

The staff members, who were not U.S. citizens and who haven't yet been publicly identified, were killed by people who were "linked with criminal groups" in the country's southeast, U.S. officials said.

Two members of a local Police Mobile Force were also dead following the assault, Nigerian police officials sad. The victims' bodies were later set on fire, officials said.