The Orlando gunman used Facebook during the massacre

Gunman Omar Mateen was active on Facebook before and during his rampage at a gay nightclub in Orlando, and he published several posts raging against the "filthy ways of the West" and blaming the United States for the deaths of "innocent women and children" abroad, according to a letter released Wednesday by the Senate Homeland Security Committee.

Omar Mateen also reportedly pledged his allegiance on Facebook to the leader of the Islamic State, and commanded the U.S and Russia to stop bombing the militant group in the Middle East.

“America and Russia stop bombing the Islamic state..I pledge my alliance to [Islamic State leader] abu bakr al Baghdadi ..may Allah accept me,” Mateen reportedly wrote in one post.

Read more at news.vice.com