After initial reports earlier today that Opeth frontman Mikael Akerfeldt broke his arm in a car accident, it turns out that the singer-guitarist missed the band's show last night (May 7) in St. Paul, Minn., after bumping his head while on his tour bus. However, the injury was severe enough to result in a hospital visit, eight stitches and a nasty headache.

Despite a serious gash on his head, fans will be happy to hear not only does Akerfeldt have no serious injuries, but that he will continue to perform with Opeth on the remainder of the 'Heritage Hunter' tour with Mastodon and Ghost. With Opeth's absence at last night's gig, Mastodon offered up an extended set to those in attendance.

Opeth released an official statement on Akerfeldt's injury via their official Facebook page:

Many have already learned that yesterday’s performances at The Myth In St Paul had to be cancelled due to Mikael having an accident.

Right before stage time Mike bumped his head on the tour bus which resulted in a pretty deep cut that required urgent medical attention. Mike was taken to hospital which he left a little later with eight stitches and a nasty headache. He’s doing OK now and we expect him to be up and running (though slightly slower) again for tomorrow’s show and onwards.

Mike & the band were very disappointed not being able to play yesterday but thank everyone for their understanding and for the tons of get-well-wishes Mike has received since.

The band also thanks their friends in Mastodon for playing an extended set that hopefully kept all who attended happy.

Akerfeldt will return to the stage on May 9 at the Fillmore in Washington D.C. See the remaining dates on the 'Heritage Hunter' tour here.