San Diego lifeguards rescued three Mexican nationals from the ocean Monday night after receiving a report that dozens of residents were trying to swim to the United States.

San Diego officials received a report from officials in Tijuana that said there was “some sort of commotion down by the marine boundary line” near Border Field State Park. When Border Patrol agents investigated the scene, they found three people — a man, a woman, and an unaccompanied child who were all Mexican citizens, according to the Los Angeles Times.