SAN JOSE — Heavy morning fog and an airplane engine fire disrupted travel Tuesday morning at Mineta San Jose International Airport.

A Delta Air Lines flight scheduled for Minneapolis early Tuesday was one of several flights delayed by fog and was on the ground when the pilot reported a fire in the left engine, according to San Jose fire and airport officials.

San Jose firefighters received the report of a Boeing MD-90 airplane with an engine fire at 7:54 a.m., according to Capt. Cleo Doss. The fire was contained to the engine and did not reach the cabin, Doss said.

The Delta flight pushed back from the gate at 6:40 a.m. but was on the ground for one hour waiting to depart due to heavy fog, according to airport spokeswoman Rosemary Barnes. Delta Air Lines said in a statement the plane returned to the gate for a reported lavatory issue when an engine tailpipe flame was observed by ground personnel and quickly went out. Customers deplaned to the terminal via the jetway.

A number of other flights were delayed because of the heavy morning fog. At least 11 departures were delayed between 6:30 and 7:30 a.m. The fog lifted by about 9:15 a.m.

All flights were back on schedule by late morning.

Contact Mark Gomez at 408-920-5869. Follow him on Twitter @MarkMgomez.