From the UK Mirror:
Huge queues at airports after US warning of bomb 'between 9pm and 11pm tonight'
Jul 03, 2014 14:35
By Steve Robson
The US Embassy in Uganda has told citizens to change travel plans amid warnings of a "specific" terror threat at the country's airport
Security is being increased at British airports after the US warned of a possible terror attack between 9pm and 11pm tonight.
The US Embassy in Uganda issued an urgent email warning citizens of a "specific threat" to the country's Entebbe International Airport within hours.
It said information from Uganda's police indicated that the attack could take place between 9 pm and 11 pm local time on Thursday, adding that citizens planning to travel at that time to consider reviewing their arrangements.
Huge queues at airports after US warning of bomb 'between 9pm and 11pm tonight' - Mirror Online
Hard to tell from the remainder of the article whether the specific threat is only for Uganda flights.