The U.S. Embassy in Nigeria has issued an emergency warning to its citizens that a racial Islamist sect may be planning attacks on hotels in the West African nation's capital.

The embassy issued the warning Wednesday morning, saying it "has received information that Boko Haram may be planning attacks in Abuja, Nigeria, including against hotels frequently visited by Westerners."

The warning said the U.S. had no further information and that the Nigerian government was aware of the threat.

Boko Haram is waging an increasingly bloody sectarian fight against Nigeria's weak central government.

This is the second time the U.S. has issued such a warning. In November, the U.S. warned about a possible hotel attack in Abuja, which the Nigerian government widely dismissed.