Russia’s Ambassador to the UN has accused Britain of supporting terrorist organizations who “kill Christians” across the Middle East, including the attacks on Coptic Christian Churches earlier this week.

Vladimir Safronkov, Moscow’s envoy to the United Nations, referred to the deadly bombings in Egypt claimed by ISIS, killing nearly 21 people who gathered to observe Christian religious rites.

The comments came after increasing tensions between Russia and the West, following Washington’s military strike against Syrian government for an alleged use of chemical weapons on civilians in Khan Sheikhoun, Idlib.

Russian President Vladimir Putin said on Wednesday that trust had eroded between Moscow and Washington under President Trump, as the two countries take opposite sides in the Syrian conflict.

“One could say that the level of trust on a working level, especially on the military level, has not improved but has rather deteriorated,” Putin said.

He repeatedly denied Syrian President Bashar al-Assad’s use of chemical weapons, adding that the attack may have been faked by Assad’s enemies.

Russian Foreign Minister Sergei Lavrov held a meeting with his visiting American counterpart Rex Tillerson on Wednesday. In opening remarks in front of reporters, Lavrov denounced the missile strike on Syria as illegal and accused the United States of behaving unpredictably.

“I won’t hide the fact that we have a lot of questions, taking into account the extremely ambiguous and sometimes contradictory ideas which have been expressed in Washington across the whole spectrum of bilateral and multilateral affairs,” Lavrov said.