Israel made its way through to the Eurovision finals on Thursday amid sustained calls for a boycott of the competition over the country's brutal war on Gaza.
Yuval Raphael, 24, will be performing on Saturday with her song "New Day Will Rise" after winning the public vote along with competitors from countries such as Armenia, Denmark and Greece.
The singer's dress rehearsal performance was disrupted as pro-Palestine supporters waved Palestinian flags, obstructing the performance.
Swiss broadcaster SRG SSR confirmed the six protesters, including a family, "disrupted the rehearsal with oversized flags and whistles" and were removed from the St Jakobshalle arena in Switzerland.
Eurovision was also accused of "censoring" the audience's booing during Raphael's performance on Thursday night.
While some booing could be reportedly heard in the broadcast, viewers claimed the noise was minimised or artificially drowned out.
Speaking to the BBC, Raphael said she and her team practised performing over "distractions" in the background for her performance.
The competition kicked off on Sunday while pro-Palestine protesters took to the streets in Basel, Switzerland.
Eurovision received significant backlash after confirming that Israel will be allowed to take part in the competition, with viewers, former contestants and participating countries sharing concerns.
Spain and Slovenia have called for a debate on Israel's involvement, while Ireland expressed concerns to the European Broadcasting Union.
Eurovision recently overturned its ban on waving Palestinian flags in the audience after being prohibited in 2024. However, participants can only wave their nation's flag on the stage and in "official spaces".
In 2024, Israel's representative Eden Golan finished in fifth place amid pro-Palestinian backlash, having had her initial song "October Rain" rejected over its political messaging referring to the 7 October attacks.