Three people have been hurt in a kitchen explosion at a bar on the waterfront in St Ives.
A member of staff has been airlifted to hospital following the blast at the Balcony Bar and Kitchen in Wharf Road.
Police said one person had "potentially serious burns". Two other members of staff were also injured, but none of the diners in the bar was hurt.
One witness described hearing an explosion then seeing "a massive plume of smoke" at the popular tourist spot.
It happened at about 15:20 BST. The harbour front was temporarily closed by emergency services but has since reopened.
Firefighters said they discovered an "industrial fryer unit" inside the property and used a hose reel jet and thermal imaging camera to extinguish the fire.
John Chard told the BBC he was on his boat when he witnessed "what appeared to be some sort of explosion".
"Something blew up - maybe a gas cylinder. There was a massive plume of smoke for about 30 seconds," he added.