Large fire in Onehunga

Auckland's Fire Service are attending a large building fire in Onehunga.

More than 16 appliances are fighting a blaze at a 100m by 20m industrial building on Alfred St, said Fire Service spokesman Jarron Phillips.

Mr Phillips said the fire reached third alarm soon after emergency services were notified at 12.10am.

"It's a large commercial building well involved in fire," he said.