International Criminal Court (ICC) Prosecutor Karim Khan will plead for extra cash to investigate Russia's war crimes in Ukraine during a speech at a conference in London on Monday, according to The Guardian.

"Karim Khan, the prosecutor of the international criminal court, will plead on Monday for extra cash to pursue Russian war crimes in Ukraine, including the potential prosecution of Vladimir Putin for overseeing the abduction of children from Ukraine to Russia," according to the statement

It notes that the prosecutor's speech at the conference will take place after his "dramatic move" against Putin.

The event was jointly organized by the governments of the UK and the Netherlands to raise funds to fund the ICC's work to investigate Russian war crimes in Ukraine.

"More than 40 nations are attending the conference hosted by the UK deputy prime minister, Dominic Raab, and the Netherlands' minister for justice and security, Dilan Yeşilgöz-Zegerius. The UK is providing an extra GBP 395,000 to fund the ICC's work," the journalists said.

They said Ukrainian Justice Minister Denys Maliuska and Ukrainian Prosecutor General Andriy Kostin will also attend the conference.