The U.S. diplomatic mission in Nigeria issued an "emergency message" to U.S. citizens in Abuja, warning of possible terrorist attacks on specific hotels in the capital.

It identified as potential targets the Nicon Luxury, the Sheraton Hotel and the Transcorp Hilton Hotel. All U.S. government personnel have been instructed to avoid these locations, and previously scheduled events have been canceled," according to the message. "American citizens should expect additional police and military checkpoints, additional security and possible road blocks in Abuja for the foreseeable future."