United Kingdom Labour Party leader Jeremy Corbyn and Israeli Prime Minister Benjamin Netanyahu exchanged words on Twitter on Monday after photos surfaced last Friday of the former laying a wreath near the graves of the Black September terrorists who killed 11 Israelis at the 1972 Munich Olympics.

“The laying of a wreath by Jeremy Corbyn on the graves of the terrorist who perpetrated the Munich massacre and his comparison of Israel to the Nazis deserves unequivocal condemnation from everyone – left, right and everything in between,” Netanyahu tweeted.

George Galloway, a former Labour Party MP known for his fierce anti-Israel stances and support for Corbyn, directly responded to the prime minister’s post with “Irony complete.”

Corbyn retweeted Netanyahu’s post and responded, “Israeli PM @Netanyahu’s claims about my actions and words are false. What deserves unequivocal condemnation is the killing of over 160 Palestinian protesters in Gaza by Israeli forces since March, including dozens of children.”

“The nation state law sponsored by @Netanyahu’s government discriminates against Israel’s Palestinian minority,” Corbyn said in a subsequent tweet. “I stand with the tens of thousands of Arab and Jewish citizens of Israel demonstrating for equal rights at the weekend in Tel Aviv.”

Corbyn has come under fire from the U.K. Jewish community over his party refusing to fully adopt a definition of anti-Semitism which has been accepted by the other parties in Parliament.