Nine people were injured Monday evening when gunfire erupted along a beach boardwalk in Hollywood, Florida, authorities said, as people ran for cover near a crowded beach boardwalk on Memorial Day.

Police responded to reports of a shooting at 6:42 p.m. and found nine victims with gunshot wounds at the scene, said Hollywood Police Department spokesperson Deanna Bettineschi during a Monday news briefing. The nine victims were transported to Memorial Regional Hospital and Joe DiMaggio Children’s Hospital after receiving aid at the scene.

The nine people hurt included six adults and three children, according to Yanet Obarrio Sanchez, a spokesperson for Memorial Healthcare System. All of the victims were in stable condition, she said.

Bettineschi said four children between the ages of 1 and 17 were hit, along with five adults between 25 and 65. One was in surgery late Monday while the others were stable, she said. It was not immediately clear if the hospital was counting a 17-year-old as an adult.

Preliminary investigations revealed that an altercation between two groups “resulted in gunfire,” said Bettineschi. Police detained one person of interest but later said that they were looking for more suspects.

Videos posted on Twitter Monday night showed emergency medical crews responding and providing aid to multiple injured people. A live cam also showed people running from the scene.

HOLLYWOOD BEACH, FLORIDA, SHOOTING:What we know about injured, suspects

Witnesses describe Memorial Day shooting

Hollywood Beach is a popular beach destination about 11 miles south of Fort Lauderdale and 20 miles north of Miami. During the Memorial Day weekend, the beach was expected to see a high number of visitors.

The Hollywood Police Department said the investigation was ongoing and a heavy presence of officers were in the area near the beach boardwalk. Officials set up an area for family members to reunite.