One man has been killed and a woman injured in an explosion outside a metro station in StockholmSweden, authorities said.

Police said a man in his 60s sustained fatal injuries after he picked something off the ground which then detonated outside the Varby Gard underground station in Huddinge.

The man was rushed to hospital while a woman, in her mid-40s, received "minor wounds" to her face and both legs.

"The man was seriously hurt injured after he picked up something from the ground and this device exploded," a spokesman for Stockholm police, Sven-Erik Olsson said.

He added that experts were examining the object.

Police officers cordon off the area outside more at Independent