Three strangers shot at random guests in front of a nightclub in the southeastern US state of Florida.
Two people died on the spot and at least 20 others were injured and taken to hospitals for treatment, police in Miami-Dade said on Sunday.
The suspects came to the club in a district of Miami after midnight in a white SUV.
They got out and "started shooting randomly into the crowd," it said.
Then the perpetrators fled.
Police chief Alfredo Ramirez promised on Twitter that the "cold-blooded murderers" would be brought to justice.
Deadly gun attacks are repeated in the United States.
Last year, more than 43,000 people in the country died from firearms, including suicides, from firearms, according to the Gun Violence Archive.
President Joe Biden last month condemned gun violence as an "epidemic" and "international disgrace". Biden had recently decided to tighten the rules of the very loose gun law, but he would need the approval of Congress for more far-reaching reforms. There, legislative proposals fail time and again due to the resistance of the conservative Republicans.