An Israeli lawmaker walked out of an international conference in Russia after his Kuwaiti counterpart called him a "child-killer."

Marzouq al-Ghanim, the speaker of the Kuwaiti National Assembly, called on Nachman Shai, deputy speaker of Israel's Knesset, to leave the Inter-Parliamentary Union (IPU) Assembly in St. Petersburg on Wednesday. Ghanim had accused Shai of representing state-sponsored terrorism.

The hashtag #Marzouq_alGhanim, in Arabic was trending worldwide on Twitter, following his remarks.

Social media users responded to Ghanim's outburst, expressing "pride" and support for his action.

The right word in the right place. Proud of you #مرزوق_الغانم — محمد العتيبي (@aletaibi59) October 18, 2017

“Occupier! Child-killer,” Ghanim can be heard shouting, at the Israeli delegate, Shai.

Earlier, another Israeli delegate had been roundly booed by the audience, as she claimed that her country is the only democracy in the Middle East.

At least 550 children were killed in the last Israeli war on Gaza, in 2014.

The Geneva-based IPU is an organisation that brings together national lawmakers from across the world.

The Assembly, which is the 137th of its kind, addressed various topics, including cultural pluralism, inter-faith dialogue, democracy and human rights.