Sydney restaurant fire put out

Firefighters have put out a fire at an inner-city Sydney restaurant.

Forty firefighters were involved in tackling the blaze on the top floor of Argentinian eatery Porteno in Surry Hills on Friday afternoon.

It was understood to have been closed while the owners focused on a pop-up restaurant in Hyde Park for the Sydney Festival.

Several hundred people were moved from the area. There were no reports of any injuries.

It was not clear how much damage was done to the building and the cause of the blaze is not yet known.

All lanes of Cleveland Street have been reopened.