WASHINGTON (AP) — Security at the U.S. embassy in Baghdad was bolstered and some staff members were being moved out of Iraq’s capital city as it was threatened by the advance of an al-Qaida inspired insurgency, a State Department spokeswoman said Sunday.

Jen Psaki said in a statement that much of U.S. embassy staff will stay in place even as parts of the country experience instability and violence. She did not say the number of personnel affected. The embassy is within Baghdad’s Green Zone. It has about 5,000 personnel, making it the largest U.S. diplomatic post in the world.