Corbyn made the remarks on Twitter in reply to Israeli Prime Minister Benjamin Netanyahu, who joined the criticism against Corbyn over his alleged participation in a wreath-laying ceremony in Tunisia four years ago to honor the perpetrators of the 1972 Munich Olympics massacre.

“The nation-state law sponsored by @Netanyahu's government discriminates against Israel's Palestinian minority. 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 said.

British tabloid the Daily Mail published photos of Corbyn at the ceremony holding a wreath while standing near the graves of members of the Black September group. The event took place in 2014, before he was elected Labour leader.

The Black September group is believed to be behind a deadly terrorist attack that targeted Israeli athletes during the 1972 Olympics in Germany which left 11 dead.

“The laying of a wreath by Jeremy Corbyn on the graves of the terrorists who perpetrated the Munich massacre and his comparison of Israel to the Nazis deserves unequivocal condemnation from everyone,” Netanyahu said on Twitter.

However, Corbyn told the British press that although he was present at the ceremony, he was not involved.

The Daily Mail cited sources close to Corbyn as saying that he was at a service to commemorate the 47 Palestinians who were killed in an Israeli airstrike in 1985 on a Tunisian base of the Palestinian Liberation Organization (PLO). The monument to the airstrike victims is only yards away from a plaque that lies beside the graves of the Black September members.

An Israeli airstrike killed 47 people and wounded 65 others on Oct. 1, 1985, according to official sources in Tunisia.

Corbyn said “wreaths were laid at the graves of those who died” in the airstrike and “on the graves of others killed in Paris in 1992”, referring to PLO members killed by Mossad agents.

 “I was there because I wanted to see a fitting memorial to everyone who has died in every terrorist incident everywhere.

“Because we have to end it. You cannot pursue peace by a cycle of violence. The only way you can pursue peace is by a cycle of dialogue,” he said.

“Israeli PM @Netanyahu’s claims about my actions and words are false,” Corbyn also said on Twitter in his response to Netanyahu.

“What deserves unequivocal condemnation is the killing of over 160 Palestinian protesters in Gaza by Israeli forces since March, including dozens of children,” Corbyn said, referring to the Israeli army’s killing of unarmed Palestinian protesters during the Great March of Return gatherings earlier this year.