LONDON (AP) — British counterterrorism police arrested three men in London on Thursday on suspicion of spying for Russia.

Britain on Friday called for a raft of measures against Russia to strengthen Ukraine's hand ahead of any future peace talks, as Ukrainian President Volodymyr Zelenskiy heads to London for discussions with key allies.

European leaders vowed to work in coordination to ratchet up the pressure on Russia as the so-called “coalition of the willing” met in London to discuss strategies to end the war in Ukraine.

British authorities on Thursday arrested three men suspected of spying for Russia, according to London's Metropolitan Police.

Zelenskyy was in London for talks with two dozen European leaders who have pledged military support to shield his country from future Russian aggression.View on euronews

Donald Trump has said he will not meet with Vladimir Putin until he thinks a deal to secure peace between Russia and Ukraine is in place."You have to know that we're going to make a deal, I'm not going to be wasting my time,

The suspects, men aged 44, 45, and 48, were arrested by the Metropolitan police at addresses in central and west London. Searches at the addresses are ongoing.

Ukrainian President Volodymyr Zelenskyy was set to hold talks in London on Friday with two dozen European leaders who have pledged military help to protect his country from future Russian aggression if a ceasefire stops the more than three-year war.