ATHENS, Sept 26 (Reuters) - Six people have died after a two-storey residential building in a tourist area of central Athens collapsed, ‌the Greek fire brigade said on Saturday, following an explosion ‌that the mayor said was likely linked to gas infrastructure.

The explosion killed four Americans, US ​officials said.

Emergency crews in heavy gear and red helmets assisted by rescue dogs, cameras and sensors found the bodies of six people, fire brigade spokesman Vassilis Vathrakogiannis said in a televised briefing. They were looking for an elderly ‌couple who lived in one ⁠apartment and four tourists who were staying in another as they removed debris from the building.

The fire brigade's ⁠crime investigation unit was also on site to identify the cause of the blast after reports of a gas smell in an area that is ​home to ​hotels and short-term rentals.

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