Dallas police are investigating after a Southwest Airlines flight was struck by a bullet Friday evening as it was preparing to depart from Dallas Love Field Airport in Texas, authorities said.

A Southwest Airlines plane preparing for departure at Dallas Love Field airport was struck by a bullet late on late Friday, prompting the aircraft to return to the gate, the airline said in a statement.

Southwest is the main carrier at Love Field, and the airline’s headquarters is there, too. The airport, ringed by residential neighborhoods, is eight miles from downtown. Love Field was the region’s main airport until Dallas Fort Worth International Airport opened in 1974.