Teenage girl Missing at Glenelg Beach

A teenage girl is missing in the waters off a South Australian beach and four other teenagers have been rescued after swimmers got into trouble on Sunday evening.

Several surf lifesaver and police boats searched for the girl near the Holdfast Marina, assisted by two helicopters, as dozens of locals line the beach, watching and hoping.

The four teenagers rescued by surf lifesavers were taken to hospital. Two are reportedly in a serious condition.

Several family members of the teens and other beachgoers joined in the search on the rocks near the breakwater north of Glenelg jetty.

Searchers line the jetty as they look for the missing girl, and surf lifesavers look in the water. Picture: AAP / Brenton Edwards

A rescuer looks for the girl off the breakwater at Glenelg. Picture: AAP / Brenton Edwards

At least six distressed family members at the scene were escorted by police officers and Glenelg Surf Lifesaving Club volunteers.

The area is near where two boys drowned on New Year’s Day last year.

Tahni Olofsson, 17, of Marion, said the family were searching for the missing girl for hours.

The rescue chopper and a police water operations boat look for the girls. Picture: AAP / Brenton Edwards

The search continues as the sun sets. Picture: AAP / Brenton Edwards

“We just heard there were five kids and they rescued four but one was still missing,” she said.

“The family was really hysterical.

“She (missing girl) could be anywhere right now, it’s hard to say when they’d give up the search.”

Paulene Decazanove was visibly upset when she heard what had happened after seeing ambulances on the beach.

Surf lifesavers and police boats look for the missing girl. Picture: AAP / Brenton Edwards

“It looks like a big family,” she said. “I saw people coming from the ocean with someone in their arms.

“That’s when I knew something was wrong.”

At least five rescue boats alongside police divers searched the waters.

Police from the Water Operations Unit and the police helicopter assisting lifesavers in the search.