The body of a Rehoboth Beach swimmer is washed ashore a day after he disappeared

The body of a swimmer who went missing after getting into trouble in treacherous conditions in Rehoboth Beach, Delaware, has washed ashore, according to police.

Richard A. Boateng, 31, of Savage, Maryland, disappeared while swimming in the ocean near Rehoboth Avenue around 5:45 p.m. Sunday, September 3.

After several emergency calls were received, the authorities conducted an extensive inter-agency search for Boateng.

The operation involved lifeguards from the Rehoboth Beach Patrol, along with officers from the US Coast Guard, the Delaware State Police Aviation Unit and the state's Department of Fish and Wildlife.

Just before 6 a.m. Monday, Boateng's body was sighted in the surf about a mile north on North Shores Beach, Rehoboth Police said in an update.

Paramedics responded and found that the swimmer was still dead at the scene of the accident.

“There is no suspicion of a crime,” the department said.

According to WGMD, Boateng ran into trouble in the surf off Rehoboth Beach just 22 minutes after lifeguards ended their duty on Sunday.

Officials had previously warned of extremely treacherous conditions in the water along the mid-Atlantic from Tropical Storm Idalia.

A witness who saw Boateng struggling in the water told WGMD he thought he was waving at someone.

“He probably shouted ‘help' and we suddenly realized, yes, he needs help. Then I started shouting “Help!” “We need a lifeguard.”

“We screamed, screamed, screamed and finally I turned to this side. I can not see him. He just raised his hand and drowned,” the witness told WGMD.

The body of 31-year-old Richard A. Boateng of Savage, Maryland was found swimming a day after he disappeared

(Rehoboth Beach Police Department)

Lifeguards who were off-duty went into action to rescue the drowning man, forming a human chain while pulling a rope through the water parallel to the beach, the news site reported.

The search continued after dark, with Coast Guard ships and helicopters firing parachute missiles into the air.

Boateng had reportedly visited Rehoboth Beach with his girlfriend and several friends.

President Joe Biden and First Lady Jill Biden have a second home in Rehoboth Beach in addition to their primary residence in Wilmington.

Mr Biden attended church in the seaside town earlier Sunday.