Tenacious D postpone Newcastle concert amid Trump joke ...

Comedy rock duo Tenacious D have postponed tonight's Newcastle show. No reason has been given for the last-minute decision.

The band stirred controversy over the weekend with a joke about the shooting of former president Donald Trump.​

The band are scheduled to play Melbourne, Brisbane and Adelaide shows over the next week. No word as to whether the shows will proceed as scheduled.

American comedy rock duo Tenacious D have postponed tonight's concert at the Newcastle Entertainment Centre just hours before doors were due to open.

No reason has been given for the cancellation at this stage.

"Frontier Touring regret to advise that Tenacious D's concert tonight at Newcastle Entertainment Centre has been postponed," the tour promoters posted on Instagram this afternoon.

"Ticket holders are asked to hold onto their tickets until further information is available."

Some fans were reportedly already lining up at the venue when staff informed them tonight's show would not be going ahead. 

Tenacious D's Australian visit took a controversial turn this week after video emerged of one member making a controversial joke on stage at the second show of their tour. 

At Sydney's ICC Theatre on Sunday night, band member Kyle Gass said, "Don't miss Trump next time" when fellow member Jack Black asked if he had a birthday wish. 

Gass's comment was made in relation to the attempted assassination of former US president Donald Trump in Butler, Pennsylvania over the weekend.

The joke has attracted a great amount of attention from international media as well as here in Australia. 

Senator Ralph Babet today called for the band to be deported from Australia immediately.

"I call on the Prime Minister Anthony Albanese to join me in denouncing Tenacious D, Jack Black, and band member Kyle Gass, and I call on the Immigration Minister Andrew Giles to revoke their visas and deport them immediately," Senator Babet's statement reads.

"Anything less than a deportation is an endorsement of the shooting and the attempted assassination of Donald J. Trump."

The sold out arena tour is Tenacious D's first Australian visit in over a decade. 

The band are set to play concerts in Brisbane, Melbourne and Adelaide over the coming six days. There is no news about those shows at this stage.