UPDATE: Akerfeldt has posted the following message on Facebook:

"Hi guys! I'm writing from beyond the grave.

"Seriously, I was not in a car crash and I haven't broken my arm. All that happened is I hit my head in MASTODON's tour bus as I was getting a new pair of (red) underwear out from my suitcase.

"Wish the story was more rock and roll, believe me.

"Anyways, I split my head open down to the skullbone and had to be taken to the emergency. They gave me a bunch of shots in the wound, cleaned me up and stapled my head shut with 8 metal staples. Head is sore and if I smile it feels like the wound is gonna burst open again, but I'll be on stage by tomorrow again.

"I feel extremely disappointed that we couldn't play at The Myth in Minneapolis, but paramedics told me I couldn't. We will reschedule the show for our next trip to the USA. So all rumors of me being in a car crash are false. I did crash my head into a car, though, well... a bus, really.

"Sorry for disappointing our fans in Minneapolis but I hope you understand. See you next time."

Swedish prog-metal greats Opeth scrapped their performance last night in Maplewood, Minn., and while various websites have offered contradictory reports, it seems the cancellation had to do with singer and guitarist Mikael Akerfeldt being rushed to the hospital following a car accident.

While The Gauntlet and Loudwire suggest Akerfeldt suffered a broken arm -- a rumor that seems to have spread through the Myth, where co-headliner Mastodon apparently rocked an extra-long set -- Blabbermouth.net reports that the frontman escaped with just a "minor cut on his head."

If Blabbermouth has it right, the singer will make a full recovery and play all of the remaining dates on the Heritage Hunter tour, which also features Ghost.

Whether Akerfeldt is nursing a sore noggin or busted wing, we at Noisecreep wish him the best.

Watch Opeth's 'Porcelain Heart' Video