Who was the Orlando nightclub shooter?

Officials searching shooter's apartment

By Evan Perez, Shimon Prokupecz, Pamela Brown and MaryLynn Ryan CNN
Copyright 2016 Cable News Network/Turner Broadcasting System, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.

Omar Saddiqui Mateen was the gunman who opened fire at a gay nightclub in Orlando, killing at least 50 people, two law enforcement officials told CNN.

The suspect, 29, who was killed by police, was from Fort Pierce, Florida, the officials said.

A law enforcement source told CNN that Mateen worked as a private security guard. He rented a car and drove to Orlando to carry out the attack, the source said.

FBI teams and local law enforcement are working to clear Mateen's apartment, a federal law enforcement source said.

Agents are going through the apartment with bomb squads and investigating the materials there, the source said.

Copyright 2016 Cable News Network/Turner Broadcasting System, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.