The search for a 14-year-old boy who went missing while swimming after he was caught up in an undercurrent was suspended on Monday afternoon.

Ocean City beach where a boy went missing while swimming. (6 ABC)

"After the Coast Guard searched for approximately 20 hours, covering more than 20 square miles with multiple search assets by air and sea, we have suspended our search for the missing boy in Ocean City," said Capt. Kathy Moore, the commander of Coast Guard Sector Delaware Bay, in Philadelphia in a statement. "Our sincerest condolences go out to his family during this incredibly difficult time."

6ABC reports the search will resume on Tuesday by Ocean City firefighers.

The boy was reported missing shortly before 7 p.m. Sunday after everyone except the teen made it back to shore. A 25-foot Coast Guard boat, a Coast Guard helicopter and crews from the New Jersey State Police Marine Unit and the Ocean City Fire Department. The search resumed at sunrise on Monday.

6 ABC reports lifeguards were off-duty when the Philadelphia teen went missing.

The beaches were reopened  to swimmers on Monday although access to the 9th Street beach was restricted according to the Press of Atlantic City.

NBC 10 reports that the Ocean City Beach Patrol has recovered six to eight people who were swimming with the teen near the 9th Street Beach when they ran into a rip current.

MORE COVERAGE:

The Associated Press contributed to this report