Authorities say a shooting in an employee parking garage at Miami International Airport has left two workers dead.

News media outlets cite police as saying that a witness heard the men arguing about 6 a.m. Wednesday. He then heard a volley of gunshots, followed by a single one.

Miami-Dade police Det. Marjorie Eloi is quoted as saying that officers found both men dead: one on the ground with multiple gunshot wounds, and the other slumped against a car with what appeared to be a self-inflicted gunshot wound to his face.

Airport spokesman Greg Chin is quoted by the Miami Herald (http://hrld.us/2aLD0RT) as saying the garage was closed for about 45 minutes while police investigated. He also said both men worked at the airport and that flights were not affected.