U.S. Ambassador to the United Nations, Nikki Haley, slammed Moscow on Thursday and joined France, Germany, and Canada in supporting Britain's assessment that Russian officers were behind a nerve agent attack in March on a former Russian spy and his daughter in the English city of Salisbury.

"Rather than accept responsibility for its actions, the Russian government has offered only denials and counteraccusations – anything to deflect attention and distract from its guilt," Haley told the UN Security Council meeting, according to Reuters.

She added that the international community should help Britain find the two suspects, who UK authorities say are Russian military intelligence agents who used aliases when traveling to the UK.

Haley also offered Russia to extradite the pair to Britain.

As UNIAN reported earlier, British Prime Minister Theresa May told MPs on Wednesday that a painstaking investigation had gathered clear evidence that the poisoning of former spy Sergey Skripal and his daughter was carried out by Russian agents, and named the suspects as Ruslan Boshirov and Alexander Petrov.

She also said the incident that killed Dawn Sturgess and left Charlie Rowley seriously ill appeared to be linked.

Downing Street has said Britain will push for tougher sanctions against Russia – and tougher enforcement of the existing regime – to increase pressure on the Kremlin over the lethal incident.