Authorities say they have made an arrest in the arson fire that heavily damaged the Florida mosque Orlando nightclub gunman Omar Mateen occasionally attended. St. Lucie County Sheriff's Office spokesman Bryan Beaty confirmed in an email Wednesday that an arrest had been made but wouldn't disclose any details until a news conference scheduled for later that evening. The Islamic Center of Fort Pierce sustained extensive damage in a fire set late Sunday on the 15th anniversary of the 9/11 terror attacks. The blaze also coincided with the Muslim holiday Eid al-Adha. The fire burned a 10-by-10-foot hole in the roof at the back of the mosque's main building and blackened its eaves with soot.

The gunman who attacked a Florida LGBT nightclub had attended the club before the attack and had used a gay dating and chat app, witnesses said. Kevin West, a regular at Pulse nightclub, said Omar Mateen messaged him on and off for a year before the shooting using the gay chat and dating app Jack'd. West was dropping off a friend at the club when he noticed Mateen – whom he knew by sight but not by name – crossing the street wearing a dark cap and carrying a black cellphone about 1 a.m., an hour before the shooting. "He walked directly past me. I said, 'Hey,' and he turned and said, 'Hey,'" and nodded his head, West said.