The U.S. embassy in Uganda warned of a possible terrorist attack on Entebbe International Airport in Uganda.
The embassy said on its website that, according to intelligence sources, there is a "specific threat" that an unknown terrorist group will attack the airport Thursday, July 3rd, between the hours of 9 p.m. and 11 p.m (1800 GMT and 2000 GMT).
It said it received information on the threat from the Uganda Police Force.
The embassy warned people planning to travel through the airport that they may want to review their plans in light of the information.
Earlier, Obama administration officials said the U.S. plans to boost security at some foreign airports amid concerns that al-Qaida may be developing new bombs that could be smuggled onto an airplane.
U.S. Homeland Security chief Jeh Johnson said the United States is increasing security at certain overseas airports with direct flights to the U.S. He gave no information on what prompted the latest move or which airports are involved.
On Thursday, the Associated Press cited U.S. counterterrorism officials as saying experts are concerned about a new al-Qaida effort to create a bomb that could be smuggled through security checks at airports.
The French news agency AFP reported that the increased security focused on airports in the Middle East and Europe. It cited an unnamed official at the Department of Homeland Security.
British airports also stepped up security measures after the announcement from the United States.
Johnson said Wednesday his department continually assesses the global threat environment and reevaluates measures to promote airport security.