Putin doesn't want a ceasefire - Finnish president

President Stubb goes on to say that he doesn't think Russia's leader wants a ceasefire or peace in Ukraine.

"His original aim was to destroy the independent sovereignty and territorial integrity of Ukraine, Stubb says. "He hasn't changed his aim. This is what all of us around the table have to understand."

He says more pressure needs to be put on Putin in the form of additional sanctions, freezing assets and "militarising Ukraine to the teeth".

Speaking about President Donald Trump, Stubb says the US leader's ability to negotiate a deal shouldn't be underestimated.

"I don't think Putin should be playing with Trump," he adds. "We need to see some activity from Russia coming soon otherwise I'm sure President Trump will stamp his foot down."

He says a ceasefire in the war is needed first and then a "just and lasting peace" that respects the core principles of international law.