SAN JUAN, Puerto Rico (AP) The U.S. Coast Guard has called off a four-day search for 14 Dominican migrants bound for Puerto Rico who reportedly went missing at sea.

Spokesman Ricardo Castrodad said Tuesday that concerned relatives called authorities after the ship left the Dominican Republic on Dec. 1 but did not arrive at its intended destination in southwest Puerto Rico.

He said crews spent more than 76 hours searching for the group, covering more than 39,000 square miles (100,000 square kilometers) between the Dominican Republic and Puerto Rico.

Hundreds of Dominican migrants cross the treacherous, 100-mile (160-kilometer) long Mona Passage every year in an attempt to reach the U.S. territory.