NASHVILLE, Tenn. — Country music legend Willie Nelson has canceled shows in Nevada and California after leaving a concert in San Diego after performing one song.

A publicist for Nelson says shows scheduled this week in Rohnert Park, California; Las Vegas; and Laughlin, Nevada, have been canceled. The San Diego Union-Tribune reported that Nelson left his show at a San Diego casino on Saturday after the first song, “Whiskey River.”

Fans told the newspaper that Nelson, who is 84, was coughing and apparently had difficulty breathing. A statement from Ticketmaster said he left the stage early because of an illness.