"In the classic Cold War", Sergei Lavrov said, "there were rules and accepted behaviour".
Russian Foreign Minister Sergei Lavrov has accused Britain, it's Western partners and the United States of playing "children's games" in their response to the poisoning of a former Russian spy and his daughter.
As tit-for-tat expulsions continue, the first Russian diplomats to be kicked out of the USA arrived back in Moscow on Sunday.
But Russia denies any involvement and has called for Britain to give it access to the nerve agent used.
Russian Foreign Minister Sergey Lavrov denounced the British accusations on Monday as a "mad and terrible provocation".
"This can be also beneficial to the British Government which found itself in an inconvenient situation after failing to fulfil its promises to voters on Brexit conditions".
He reiterated that Moscow had no reason to poison Skripal - whom it convicted of treason and handed over in a 2010 spy swap - on the eve of a presidential election in March and months before Russian Federation hosts the World Cup.
Britain has called it "highly likely" that Russian Federation was responsible for the attack using a nerve agent developed in the USSR. Governments of several countries, let alone experts, ask such questions to London, but have to face a wall of silence in return, Lavrov said.
"If I understand correctly, sophisticated attacks usually lead to instant death", he said.
"How far the escalation goes does not depend on us", he said.
"Why has Russia been denied consular access to the two Russian nationals, Sergei and Yulia Skripal, that have become crime victims in the British territory?" the first of the tweet read. On March 26, in retaliation for the assassination attempt, the United Kingdom expelled 23 Russian officials, the United States expelled 60, and 19 other countries, mostly North Atlantic Treaty Organisation allies, expelled almost another 50.
He said he hoped Sergei Skripal would "also follow this example" and get better.
Ushakov expressed the hope that Russian Federation and the United States could return to "constructive and serious dialogue". In retaliation to the UK's steps, 23 British diplomats were expelled from Russian Federation, the British consulate general in the city of St. Petersburg was closed and the British Council had to shut down its operations in Russian Federation.
"Okay, you expelled diplomats".