The prime minister said the government had concluded it was “highly likely” that Russia was responsible for the attack on Sergei Skripal and his daughter Yulia in Salisbury on 4 March.
Theresa May has declared that Russia provides “immediately provide full and complete disclosure”.
She continued: “Should there be no credible response, we will conclude that this action amounts to an unlawful use of force by the Russian state against the United Kingdom.”
“This attempted murder using a weapons-grade nerve agent in a British town was not just a crime against the Skripals, it was an indiscriminate and reckless act against the United Kingdom, putting the lives of innocent civilians at risk.
“We will not tolerate such a brazen attempt to murder innocent civilians on our soil.”
“This has happened against a backdrop of a well-established pattern of Russian aggression.
“Russia’s illegal annexation of Crimea was the first time since the Second World War that one sovereign nation has forcefully taken land from another.”
“We should be giving a robust response from the whole of this House to this incident.
“We have been working with our allies on this, and we will continue to talk to our allies about what has happened on British soil and the response.”
Mr Corbyn replied to Mrs May’s statement: ”
“We need to continue seeking a robust dialogue with Russia on all the issues dividing our countries, both domestic and international – rather than simply cutting off contact and simply letting tensions and divisions get worse, and potentially even more dangerous.
“We’re all familiar with the way huge fortunes, often acquired in the most dubious circumstances in Russia, sometimes connected with criminal elements, have ended up sheltering in London and trying to buy political influence in British party politics.
“Meddling in elections, as the Prime Minister put it, and there has been over £800,000 worth of donations to the Conservative Party from Russian oligarchs and their associates.””