One person has died and fourteen have been injured following an explosion in a block of flats at a Spanish beach resort.

Emergency services say they're not sure what caused the blast in Premia de Mar.

The resort is around 25 kilometres north of Barcelona.

Two of the injured are in a serious condition.

@angelqtravel me cuenta como ha caído de la cama con la violenta explosión de Premià de Mar, estas son sus fotos pic.twitter.com/0dgQLXNOJS

— David Bigorra (@dbigorra) September 18, 2016

Amateur footage captured the aftermath of the blast. 

Cause of Premia de Mar explosion is unknown although gas technicians have visited the site https://t.co/tS3QZ6mJqT pic.twitter.com/gwsUlXUWPW

— Daily Mail Online (@MailOnline) September 18, 2016