A ‘powerful’ explosion has been reported at a school building in the Swedish town of Karlstad, local media say. Emergency services are at the scene. Fire broke out at the site following the explosion, Expressen newspaper reported. There have been no reports of casualties so far.

“We are on site now and are trying to ascertain what has exploded,” Ola Akesson of Karlstad’s emergency services told the Expressen newspaper. The “bang” from the explosion could be heard in other parts of the city, she added. “It was a powerful explosion,” NWT cited Akesson as saying. Big plumes of smoke could also be seen rising from the site. FULL REPORT