Mass murderer Omar Mateen texted his wife during the Pulse nightclub massacre, a law enforcement official briefed on the investigation told CNN.

Around 4 a.m. on June 12, about two hours after he started the attack and while holed up in a bathroom, Omar Mateen texted his wife, Noor Salman, asking if she’d seen the news, the official said.

At one point, she responded with a text saying that she loved him. Salman also tried calling her husband several times during the standoff, a second law enforcement official said.

The timing of her calls came after reports of the attack had emerged, and apparently after she realized her husband might be responsible. He didn’t answer, the official said.

It’s not clear if Salman made any attempt to report her husband during that time.