Three more Kneecap concerts have been cancelled in Germany.
It comes after news that footage of a band member calling for MPs to be killed is being assessed by counter-terrorism police.
A ticket site for the gigs in Hamburg, Berlin and Cologne states that the summer shows are no longer going ahead.
A number of politicians have called for the Irish rap band to be uninvited from some UK gigs, with Tory MP Mark Francois saying the group should not be allowed to play Glastonbury in light of the ongoing police investigation.
The largest body representing Jews in the UK have called for Glastonbury to cancel the group's planned performance.
In a statement, the Board of Deputies of British Jews said the rap trio's remarks had "caused great concern both within the UK Jewish community and wider society".
Speaking on RTÉ's Prime Time on Tuesday, the band's manager said "moral hysteria" had taken hold and that the band are being held to a higher moral standard than politicians.
Daniel Lambert claimed a "concerted campaign" against the group is "solely about de-platforming artists".
"It's about telling the next young band, both through the music industry and through the political class, that you cannot speak about Palestine," he said.
Other bands back Kneecap
A number of other artists have signed a joint statement in support of Kneecap.
Fontaines DC, Annie Mac, Bicep, Massive Attack, Pulp, Paul Weller and Christy Moore are among the artists who signed the open letter by Kneecap's record label, Heavenly Recordings.
The statement said there had been a "clear, concerted attempt to censor and ultimately deplatform" the band.
It accused "senior political figures" in Westminster and the UK media of being "openly engaged in a campaign to remove Kneecap from the public eye".
"As artists, we feel the need to register our opposition to any political repression of artistic freedom," the statement added.
"In a democracy, no political figures or political parties should have the right to dictate who does and does not play at music festivals or gigs that will be enjoyed by thousands of people."
