The evacuation of Birmingham-Shuttlesworth International airport was prompted by a threat received around 4 p.m., the airport said. The terminal was declared secured around 6 p.m. (7 p.m. ET), and operations have since resumed.
The evacuation was prompted because of the discovery of a written bomb threat. Police spokesman Johnny Williams said a sweep was made with dogs and nothing was found in the airport, reported al.com.
The airport website said several flights into the airport were being diverted.
The evacuation comes just days after a 23-year-old gunman opened fire in the Los Angeles International Airport, killing a TSA officer and injuring several other people.