Two uniformed personnel with 'USCG' interact with a person in a white 'Houston' T-shirt on a boat at sea.
One of three undocumented migrants who were intercepted by federal personnel Saturday. (Photo courtesy of the U.S. Coast Guard)

The U.S. Coast Guard caught three undocumented immigrants in a small boat off the coast of Imperial Beach over the weekend, authorities reported Monday.

Personnel with the federal maritime agency spotted the 20-foot vessel roughly six miles from shore at about 4 p.m. Saturday, according to USCG public affairs.

When the occupants of the boat refused to surrender, the federal personnel fired warning shots with a shotgun and then fired pepper-spray rounds onto the skiff, the Coast Guard reported. At that point, the suspects — two of whom claimed Mexican nationality, and the other Turkish citizenship — gave themselves up.

They were turned over to the custody of the Department of Homeland Security at Ballast Point.