Washington will cooperate with any country, including Russia, that shares its interest in defeating ISIS, US President Donald Trump’s spokesman, Sean Spicer, said.

Responding to a question about Russian claims of a joint air mission with the US in Syria, which the Pentagon has denied, Spicer said Trump would “work with any country that shares our interest in defeating ISIS”, saying that applied to “Russia or anyone else”.

Donald Trump in his inaugural address on Friday said the US will seek new allies to “unite the civilized world against radical Islamic terrorism” and eradicate it “from the face of the earth.”