NEW ORLEANS (AP) — A U.S. Coast Guard plane and a Mexican Navy vessel are searching the Gulf of Mexico for a small plane that flew far beyond its Louisiana destination.

The Coast Guard said Thursday that Steven Schumacher’s family reported him overdue at 10:30 p.m. Wednesday, two hours after he was scheduled to land near Baton Rouge, Louisiana.

A Coast Guard spokeswoman says an online flight tracker showed the Piper Aztec’s last known position about 11:40 p.m. Wednesday, about 440 miles (700 kilometers) past Louisiana’s coast.

FAA spokesman Lynn Lunsford says Schumacher never checked onto the Houston air traffic control center’s frequency and didn’t respond to attempts to contact him.

Schumacher flew out of Cape Girardeau, Missouri, where a hangar lease shows he signed it for Critical Care Response of St. Petersburg, Florida.