TIJUANA, Mexico (AP/News 8) - The U.S. Coast Guard is ending aerial searches for seven Americans still missing after a charter fishing boat sank off Mexico.

The Coast Guard says its search on Tuesday of a 803 square-mile (2,080 square-kilometer) area of the Sea of Cortez by a C-130 Hercules aircrew would be its last.

Rear Admiral Joseph Castillo said the 11th division's "deepest sympathies go out to the friends and families of the missing men."

Tuesday evening, some of the family members of those still missing say they are angry, after they say the Department of Defense rejected a request from the Mexican Navy for dive assistance to explore the sunken fishing boat 200 feet below the surface.

Baja California state Civil Protection Director Alfredo Escobedo Ortiz said small Mexican naval craft and other fishermen would continue searching for bodies or survivors.

The boat went down on July 3. Nineteen U.S. tourists and 16 Mexican crew members made it to land. One was found drowned on a remote island beach. The others remain missing.

In all, the Coast Guard conducted a total of 10 aircraft missions to scour more than 7300 square miles.