The wife of Orlando gunman Omar Mateen said she knew her husband was planning an attack, multiple outlets reported Tuesday, citing anonymous law enforcement officials. She may now face charges.

Noor Salman Mateen, the gunman's second wife, told the FBI that she was aware of his plan for a mass shooting at the Pulse nightclub in Orlando, Florida, but didn't notify authorities, according to local TV station WFTV. She said that she tried to discourage her husband from carrying out the attack, NBC News reported.

Authorities are considering criminal charges against Noor Mateen, according to ABC News.

Omar Mateen killed 49 people and injured another 53 at the nightclub early Sunday morning. He died in a shootout with police.

Orlando Police Department/Handout via Reuters Omar Mateen reportedly took his wife along when he scouted locations.

Mateen's wife was with her husband when he bought ammunition and a holster, NBC reported.

She had driven him to the Pulse nightclub on an earlier occasion when he scouted the location, according to NBC. CBS News said that she had also traveled with him to Disney World in April as he allegedly surveilled parts of the amusement park and that she went with him to downtown Orlando earlier this month to scout other Disney facilities as well as the nightclub.

Noor Mateen is cooperating with authorities, and as WFTV noted, that may affect any decision to arrest her.

The FBI declined to comment to The Huffington Post about Noor Mateen.

This is a developing story and will be updated.