Police in France were on Saturday hunting a suspect following a blast in a pedestrian street in the heart of Lyon that lightly wounded 13 people two days ahead of hotly contested European Parliament elections.
Police issued an appeal for witnesses on Twitter as they sought the man believed to be in his early 30s, who was picked up by security cameras on a mountain bicycle immediately before the explosion.
An image of the suspect, wearing light-coloured shorts and a longsleeved dark top, was posted. He was described as "dangerous".
Justice minister Nicole Belloubet told BFM television it was too soon to say whether the blast was a "terrorist act".