At least nine people, including two girls, were killed and dozens injured in multiple shootings in several US states over the weekend, according to authorities and media reports.
A 16-year-old girl died just after 1 a.m. on Sunday, shortly after gunfire broke out at the Bicentennial Park Amphitheater in Columbus, the capital city of Ohio, Xinhua news agency quoted the local police as saying.
Five other teens were injured in the shooting.
The incident occurred at a private event that was promoted on social media, according to the police statement.
What sparked the shooting remains unclear, and police have not identified a suspect, the NBC Columbus-affiliate WCMH reported.
In Youngstown, the ninth largest city in Ohio, three people were shot dead and five others injured at a bar on early Sunday morning, according to a CNN report, citing local police sources.
Police responded to the reports of shooting at the Torch Club Bar & Grille in Youngstown shortly after 2 a.m. on Sunday, said the report.
Detectives said some sort of argument broke out near the bar and there was "an exchange of gunfire", local media outlet WKBN reported.
Youngstown has witnessed 11 homicides this year, with 42 people shot and wounded, said WKBN.
In Bridgeton, New Jersey, two people were killed with 12 others injured in a house party shooting just before midnight, the authorities said on Sunday.
The dead were a 30-year-old man and a 25-year-old woman, state police said.
One of the injured, all adults, is in critical condition.
Troopers responded to the scene at 11.50 p.m. Saturday, the state police said.
More than a hundred people were at that home for a party at the time, according to an ABC News report.
In North Charleston, South Carolina, a 14-year-old girl was shot dead and another 14 people were injured after an unauthorised neighbourhood concert on Saturday evening, local media outlet WCIV reported on Sunday.
Authorities said the shooting occurred after a fight broke out near the concert stage. Police are investigating the incident.
In Minneapolis, Minnesota, two people died and another eight were injured in a shooting incident early Saturday morning.
The Minneapolis Police Department (MPD) said officers responded to "an exceptionally chaotic scene" at 1.59 a.m. at a bar in downtown Minneapolis.
Preliminary investigation revealed two people both pulled out guns and began shooting at each other as they got into a verbal confrontation.
"The two deceased are males. One male is in critical condition and the remaining 7 have non-life-threatening injuries," the MPD said in a statement.
Despite the frequency of multiple mass shootings across the US, major gun control legislation is unlikely due to deep partisan and cultural divide in the country, experts say.