At least five people are feared dead after the collapse of a five-storey apartment block in the Spanish city of Palencia.
At least eight residents were injured by the morning explosion, caused by a suspected gas leak.
One seriously injured six-year-old girl was airlifted to hospital in nearby Salamanca.
The explosion's shockwave blew out windows in a 200-metre radius. Television news showed rescue workers crawling over the rubble of the flattened building, carrying out bodies on stretchers.
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Authorities said they did not know how many people were at home when the blast ripped through apartments at 5.47am (4.47am Irish time). Spain is celebrating the May Day public holiday today - meaning many people could be away.