A speech by German Chancellor Angela Merkel was interrupted by a group anti-austerity protestors, who chanted ‘No’ in Greek in support of a negative vote in Greece’s Sunday’s referendum on whether to accept the harsh bailout demands of its creditors.

The incident occurred when Merkel was just about to begin her speech at an event in Berlin dedicated to her Christian Democratic Union Party’s 70th anniversary.

The demonstrators chanted “OXI,” which means “No” in Greek, and displayed small signs with the same message.

Security officers were quick to remove the protestors, who show put up no resistance.