A fire aboard a Norwegian chemical tanker was extinguished Monday after an apparent explosion prompted a large-scale emergency response off Norway’s southeast coast, with all 15 crew members accounted for and no injuries or pollution reported. Ship manager Utkilen AS said the incident occurred on July 28 aboard the 9,500-dwt chemical tanker Bergstraum while the vessel was at anchor outside Fredrikstad. Norway’s volunteer sea rescue organization, Redningsselskapet, said it received reports of an explosion and fire aboard the vessel near Skjærhalden, triggering a multi-agency response. The rescue vessel RS Ragnar Stoud Platou arrived quickly at the scene, while RS Stormbull transported firefighters to the tanker. Built in 1996, Bergstraum is a double-hulled chemical tanker registered in the Norwegian International Ship Register and classed by DNV.