The blast took place around 5.30pm in the fishing town of around 6,000 people.

Several Spanish TV channels broadcast an image that they said was from the scene that showed dead bodies. (Twitter pic/Terror Alarm)

ORIO: Two people – a man and woman – died in an explosion in the town of Orio in northern Spain, the Basque regional security department said on Tuesday, and media cited authorities as saying the incident was being investigated as likely gender-based violence.