29-year-old Omar Mateen, US citizen of Afghan origin, had opened fire on Pulse gay nightclub in Orlando on June 12 that killed 49 people and left 53 injured.
The Florida mosque where Orlando nightclub shooter Omar Mateen worshipped was targeted in an arson attack on Monday, authorities said. Fire crews responded to a 911 call reporting that flames were coming out of the Fort Pierce Islamic Center, Major David Thompson of the St. Lucie County Sheriff's Office said.
Security video showed an individual approaching the building from the east, he said. "Immediately after the individual approached, a flash occurred and the individual fled the area," Thompson said.
"Evidence has revealed that this fire was set intentionally," he said. "The sheriff's office is currently investigating this as an arson." No injuries were reported and the extent of the damage was not immediately clear.
Photographs posted on the sheriff department's Facebook page showed fire engines parked in front of the building, a former church, with the facade appearing undamaged. Authorities were working on enhancing the security video to help identify the perpetrator.
Thompson declined to speculate on a motive, but noted that it came shortly after the 15th anniversary of the 9/11 terror attacks on the United States. "We all know the implications of the date... Is that related? I would not want to speculate but certainly that is in the back our minds," he told reporters.
The attack also came as Muslims worldwide prepared to celebrate Eid al-Adha, Islam's feast of sacrifice. The Fort Pierce mosque's gathering on Monday was moved "to another area and they're going to allow us to conduct our investigation so we can hopefully determine who set it," Thompson said.
Forty-nine people were killed and another 53 injured on June 12 when Mateen, a 29-year-old US citizen of Afghan origin, opened fire on the Pulse gay nightclub in Orlando. Mateen was killed by police. The mass shooting was the deadliest in modern US history.
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