1 Aug 2012 11:35 AM EST

-by Anthony Bell, Contributing Writer; Image: Jaz Coleman (Image Source: The Guardian)

Jaz Coleman, lead singer of the British post-punk group Killing Joke, has been reported missing by the band.

After posting a Facebook message “maligning both The Cult and The Mission,” two bands set to tour with Killing Joke in September, Coleman allegedly disappeared, bandmates reported.

“He is now AWOL and has not contacted any of his band mates,” a Facebook message from the band read. “We are deeply embarrassed by this and offer our sincere apologies to all involved.”

“We are all concerned about our missing singer's welfare,” they added.

The band had agreed to play the downsized shows and said they were looking forward to it.

“We would still like to honour our commitment to this tour, the other bands, and all the Gatherers and people who have already bought tickets and made travel arrangements,” the statement continued. “If this proves not possible, Killing Joke will make alternative arrangements to compensate for the trouble caused.”

The band, which formed in 1978, says they are doing all they can to find their missing frontman.