SAN FRANCISCO, Calif. (WTAQ) - Police in San Francisco say no one has been arrested in connection with a threat today against American Airlines. 

A police spokesman says people were taken off a plane after authorities received a call threatening a hijacking. 

Police could not say if there are any suspects in the case. The police spokesman said the FBI is investigating. 

All the passengers were returned to the terminal and the plane has been towed off the tarmac. American Airlines is trying to book the passengers on other flights to New York.