LOS ANGELES — San Francisco 49ers linebacker Aldon Smith was arrested Sunday at Los Angeles International Airport after authorities said he became belligerent during a security screening and threatened that he had a bomb.

The 24-year-old player was randomly selected for a secondary screening at Terminal 1 and became uncooperative with the process, airport police Sgt. Karla Ortiz said. She said he told a TSA agent that he had a bomb before walking to the gate. When airport police officers caught up with him, Ortiz said Smith became uncooperative and was taken into custody.