Updated 4:29 p.m. ET
The shooter responsible for the deadliest mass shooting in U.S. history had pledged allegiance to the Islamic State in Iraq and Syria, or ISIS, a lawmaker said.
"According to local police, he made a pledge of allegiance to ISIL," Rep. Adam Schiff, a Democrat from California and the second-highest ranking member of the House Intelligence Committee, said on Sunday during an appearance on CNN, using another name for the terror group.
The gunman, who was shot and killed in a shootout with police, made the pledge during a 911 call in which he also referenced the Boston Marathon bombing, the news organization later reported. He was identified as Omar Mir Seddique Mateen, a 29-year-old U.S. citizen and Muslim who lived in Fort Pierce, Florida, and whose parents were of Afghan origin, Fox News reported.
It wasn’t clear whether Mateen was acting as alone or coordinating with ISIS in the Middle East or abroad, Schiff said. ISIS officials have reportedly encouraged supporters to launch attacks during Ramadan, a month-long religious holiday that began last week.
The incident was the deadliest mass shooting in American history, with at least 50 individuals confirmed dead and another 53 injured. The…