An undated photo from a social media account of Omar Mateen, who police have identified as the gunman in the mass shooting at a gay nightclub in Orlando, Florida, on June 12, 2016. REUTERS

Noor Salman, the wife of the Orlando nightclub shooter Omar Mateen, was arrested Monday by the Federal Bureau of Investigation on a charge of obstruction, the New York Times reported.

Mateen, who was killed by police, shot and killed 49 people at gay nightclub Pulse in June 2016 and investigators have been “weighing” charges against Salman ever since, according to The Times.

Salman was arrested outside her home in San Francisco and is expected to appear in federal court Tuesday.

When the investigation into the June 12 shooting got underway, Salman was reportedly questioned for hours and officials believed she wasn’t being truthful. She is a U.S. citizen of Palestinian descent and told the FBI she tried to convince Mateen not to go through with the most deadly mass shooting in the country’s history, local NBC affiliate WESH reported.

Salman, 30, eventually granted her first interview after the shooting to The Times in November. She denied having previous knowledge of the attack and offered condolences to the victims and their families. Salman said Mateen could at times be abusive, like pulling her hair or choking her, and that he could win a custody battle over their son if their marriage ever ended.

“I was unaware of everything,” Salman said. “I don’t condone what he has done. I am very sorry for what has happened. He has hurt a lot of people.”

On her decision to speak out, Salman also said: “I just want people to know that I am human. I am a mother.”

Orlando Police Chief John Mina released a statement about the arrest.

Salman grew up in Rodeo, Calif., roughly a 30-minute drive from San Francisco and part of the Bay Area, and met Mateen in 2011 through an online dating website called Arab Lounge.

Mateen’s first wife, Sitora Yusufiy, said in a television interview in September that Mateen targeted the gay club because she believed he was secretly gay and hoped to “impress” his homophobic father, The Advocate reported.