About 30 people were booted out of the Israel Philharmonic Orchestra's BBC Proms concert at London's Royal Albert Hall for disrupting the event.
Anti-Iraeli protesters yelled out as Zubin Mehta stood to conduct Bruch's violin concerto. Many other audience members booed in response.
BBC Radio 3 had to interrupt its live broadcast twice due to the noise.
The Palestine Solidarity Campaign had earlier called on people to boycott the concert and urged the BBC to cancel it, claiming the IPO showed "complicity in whitewashing Israel's persistent violations of international law and human rights".
The performance got off to a peaceful start at 7.30pm, but within minutes
protesters started singing loudly to the tune of Ode to Joy as the orchestra
played Passacaglia, Op. 1 by Anton Webern.
After some protesters were ejected, different groups started loudly booing and
shouting as soloist Gil Shaham prepared to play Max Bruch's violin concerto.
But following the interval the protests continued, forcing Zubin Mehta, the
orchestra’s Indian-born conductor, to stop for more than five minutes as
security ejected protesters, who unfurled Palestinian flags.
The BBC's Tom Symonds said: "As Zubin Mehta stood up and began each piece a small group of protesters each time tried to stop the music.
"They sang, they shouted, they were met by boos by the audience and they had to be removed by the security staff."
Outside the concert hall a group of about 20 campaigners waved banners and sang songs in protest against the appearance of the Israel Philharmonic Orchestra (IPO).
Several pro-Israeli groups met them with their own protest outside, our correspondent said.
He said it had been a "pretty disruptive" but the orchestra was said to have "taken it all in their stride and had smiles on their faces".