FORT LAUDERDALE, Fla. - Law enforcement officials say the gunman in a deadly Florida airport shooting had a semi-automatic handgun, and they expect to release charges against him this afternoon.

Authorities say Army veteran Esteban Santiago of Anchorage, Alaska, killed five and wounded six Friday in Fort Lauderdale.

At a news conference Saturday, a day after the attack, the FBI said it had interviewed the suspect's family.

Local and federal officials also said at the news conference that they believe he came to Fort Lauderdale specifically to carry out the attack, though they had not uncovered any triggers for it in their investigation. They say they still believe the shooter acted alone and that they have several critical leads.