The gunman who killed 49 people at an Orlando gay nightclub Sunday sent a text message to his wife during the rampage, asking "do you see what’s happening?" a source close to the family told NBC News Thursday.
The texts between Omar Mateen and his wife, Noor Zahi Salman, during the attack on the Pulse nightclub were first reported by CNN. Mateen, 29, was later killed in a shootout with police.
Mateen was killed in a shootout with police after authorities used an explosive charge and an armored vehicle to punch a hole a bathroom wall at around 5 a.m., authorities said. Hostages escaped through the breach. Mateen also emerged through the hole with a long gun and and a handgun and was killed in a gun battle, police said.
The attack is the deadliest mass shooting in modern American history. President Barack Obama called it an act of terrorism. Mateen called 911 and pledged allegiance to the terror group ISIS and referenced the Boston marathon bombers as he held hostages, FBI Director James Comey has said, but a motive has not been determined.
Salman is cooperating with investigators and has volunteered to take a polygraph test, the source close to her said. She is in the process of hiring attorneys to represent her, according to the source.
Ayman Mohyeldin is an MSNBC anchor who has long reported on the Middle East and the Arab world.
Pete Williams is an NBC News correspondent who covers the Justice Department and the Supreme Court, based in Washington.