After unequivocal and unflinching support from its ally Chinainfo-icon in the face of scathing criticism from the Donald Trumpinfo-icon administration, Pakistaninfo-icon also received backing from Russiainfo-icon which lambasted the new USinfo-icon strategy in Afghanistaninfo-icon as a 'futile course'.

Russian presidential envoy to Afghanistan Zamir Kabulov insisted that Islamabad is "a key regional player to negotiate with".

"Putting pressure [on Pakistan] may seriously destabilise the region-wide security situation and result in negative consequences for Afghanistan," Kabulov told Russia's Afghanistan Daily on Tuesday.

Kabulov statement came after President Trumpinfo-icon this week heaped criticism on Pakistan for what he called harbouring the terrorists the Americans were fighting in Afghanistan.

"We have been paying Pakistan billions and billions of dollars. At the same time they are housing the very terrorists that we are fighting," he claimed while unveiling his new Afghan strategy. "That will have to change and that will change immediately."

In Moscowinfo-icon, Foreign Minister Sergei Lavrov on Thursday called the new US strategy for Afghanistan regrettable, saying the blueprint unveiled by Trump was a 'futile course'.

Speaking at a press conference on Thursday, Lavrov said Russia has expressed "regret that the main focus of the new [Afghanistan] strategy announced by Washington is regulation by methods of force".

"We are certain this is a futile course," he said, furthermore rejecting suggestions that Moscow was behind arming the Taliban.

In his Afghan strategy, Trump announced 4,000 new troops for deployment to Afghanistan, backtracking from his earlier promise to end Americainfo-icon's longest warinfo-icon, though other specifics of the plan remain unclear.

Secretary of State Rex Tillerson suggested on Tuesday that Moscow is arming the Taliban. "To the extent Russia is supplying arms to the Taliban, that is a violation, obviously, of international norms," he said.

"It's not the first time we are accused of supporting and even arming the Taliban," Lavrov said. "Not one fact has been presented" to support this.The spokesperson for Russia's foreign ministry Maria Zakharova reiterated the same in a press briefing.

The American policy "focuses on the search for a military solution to the Afghan issue, particularly through increasing the number of foreign troops," said Zakharova, according to Russia's official TASS news agency.

She denied US accusations on Moscow's arms supplies to the Taliban, saying: "We once again declare that we do not provide any support to the Taliban."

The spokesperson added that Moscow was ready to assist Kabul in training and equipping national security forces and reaffirmed its openness to cooperate with both the US and other countries

Earlier this year, a similar allegation was made by NATO commander Curtis Scaparrotti, who said Moscow is assisting and possibly supplying the Taliban and its influence is growing in Afghanistan.

Lavrov said Moscow only contacts the Taliban for two things: ensuring safety of Russian citizens in Afghanistan and pushing the Taliban to hold talks with the Afghan government.

The resurgent Taliban is an officially banned organisation recognised as a terrorist group in Russia but some Russian officials have said Moscow is exchanging information with the group when it comes to fighting Islamic Stateinfo-icon militants.