A series of explosions have rocked Sweden, with the latest occurring at a multi-family home in the Johannelund area of Linköping.

This particular building was under police surveillance, reportedly because a family related to a suspected 17-year-old triple murderer had previously lived there.

The teenager is accused of killing a man in Västberga and two women in Tullinge.

A man in his mid-thirties has been arrested in connection with the Linköping explosion, suspected of attempted murder.

No casualties were reported, but the recent spate of bombings across Sweden has prompted government officials to announce plans for new security measures.