The United States and Britain closed their embassies in Yemen Sunday because of security concerns.
U.S. President Barack Obama's top counter-terrorism aide, John Brennan, told CNN the U.S. embassy was closed because there are indications al-Qaida is planning to carry out an attack in Sana'a, possibly against the diplomatic building.
The embassy says the threats are from the group Al-Qaida in the Arabian Peninsula, which is linked to the failed bombing of a U.S.-bound airplane on Christmas Day (December 25).
The embassy building was the target of a deadly al-Qaida attack in 2008.
Britain and the United States say they will fund a counter-terrorism police unit in Yemen. Brennan told U.S. television, Fox News that does not mean U.S. troops will be on the ground there.