A gunman who opened fire during a Halloween street celebration that drew thousands of costumed revellers to downtown Orlando killed two people and wounded six others early Friday, authorities said. Officers quickly arrested a 17-year-old male suspect, the city's police Chief Eric Smith said during a briefing. Authorities have not yet determined a motive. The shooter fired in in the city's downtown bar and restaurant district around 1 am.

Officers responded as costumed celebrants fled on foot, and the same gunman then fired again about a block away, Smith said. The six wounded, who range in age from 19 to 39, were taken to a hospital and were in stable condition, Smith said. Smith showed video from street security cameras and a police body camera that recorded the shootings and the suspect's arrest. After the initial shots were fired, police used security video to put out a description of the suspect, but police then saw him open fire at the second location, Smith said. "Whatever his mindset was, he was going to shoot no matter what,"Smith said.