A driver slammed into spectators at the start of a Pride parade in South Florida, killing one man and seriously injuring another, authorities said.

Some witnesses said the crash appeared to be an intentional act, but Fort Lauderdale Police Detective Ali Adamson told reporters that authorities were investigating all possibilities.

The driver and the victims were a part of the Fort Lauderdale Gay Men’s Chorus family, according to a statement reported by news outlets from the group"s president, Justin Knight. Police said the driver was taken into custody, but it was unclear whether he had been charged.