They say in a statement: "In just a few months we are celebrating our 25th anniversary in the name of death metal. Can you believe it? 25 years filled with blood, sweat and tears and one hell of a pile of good albums to be really proud of.

"But this celebration is not only to look back and be nostalgic - it's also to embrace the very bright future of this band. We feel great at the moment and we will make 2015 the best year so far. We have definitely done our best to produce a death metal classic."