Warnings of more terror attacks targeting Westerners have been issued worldwide.
The US State Department said it had received information about a terrorist threat against a specific neighbourhood in the western Saudi city of Jeddah and that some US officials had already moved out of the area in response.
The warning follow this week's suicide bombings at expatriate compounds in Saudi Arabia that left 34 people dead. Al-Qaeda is suspected of being responsible for the bombings.
Amid fears extremists were planning an imminent attack in Kenya, British Airways said today it had heeded a warning from the British transport ministry and suspended all flights to the east African country.
The transport ministry told airlines that "the threat level to UK civil aviation interests in Kenya has increased to imminent".
The British Foreign Office has also advised its nationals against travel to Kenya because of the alleged imminent threat of attacks.
Britain's decision to suspend flights to Kenya came just hours after Kenyan authorities said they had information that one of the suspects indicted for the deadly bombing of the US embassies in Nairobi and Dar es Salaam was planning another attack.
The synchronised attacks on the US embassies in Kenya and Tanzania in August 1998 killed 224 people and injured more than 5,000 others.
The United States had warned on Wednesday of a "high potential" for terrorist attacks targeting US citizens and interests throughout east Africa, particularly Kenya.
As the first suspect in the Bali bombing went on trial this week, the Australian and New Zealand foreign ministries boosted warnings today for their citizens in southeast Asia.
They warned that terrorists were targeting the region for more attacks and saying the organisers of last year's Bali bombing retained the ability to stage further attacks.
AFP