Hasan Piker, a popular online commentator and streamer, says he was not allowed to enter the United Kingdom just before several speaking events. He revealed that his permission to travel had been revoked prior to his departure.

The United Kingdom’s Home Office said Piker and Uygur were blocked from entering the country because their presence “may not be conducive to the public good.”

The ban on the left-wing commentators has shocked many across the political spectrum.