The US may repeat its strike on Syria's military infrastructure, British Foreign Secretary Boris Johnson told The Sun hours after he announced the cancellation of his visit to Russia.

"It's important to understand that they could do it again," the newspaper quotes the politician as saying ahead of a meeting of G7 foreign ministers where new sanctions against Russia could be discussed. Johnson praised US President Donald Trump for showing "a capacity for decisive action that has been sadly lacking in recent years."

"There is no doubt that the actions of the US have fundamentally changed the situation in Syria. We must make it clear to (Vladimir) Putin that (Bashar) Assad's time is up. By continuing to support a man who is gassing his own people, he is further damaging Russia's image in the eyes of the world. He must now understand that Assad is now toxic in every sense, he is poisoning innocent people in Syria with weapons that were banned 100 years ago. And he is also poisoning Russia's reputation," the British diplomat believes.

The head of the British Foreign Office, commenting on the cancellation of his visit to Russia, noted that instead he was “focused on working with the US and concentrating the G7 efforts on ending the war and rebuilding Syria.” “Rex Tillerson (US Secretary of State) will present a unified G7 position on Russia,” he said.

A proposal for new sanctions on Russia is on the agenda for today's G7 foreign ministers' meeting in Italy. Johnson called for "truly punitive" sanctions on Russia if it does not stop supporting Assad in response to the use of chemical weapons in Idlib province, where more than 90 people have been killed. The West accuses Syrian government forces of using chemical weapons.

Johnson: US may repeat strike on Syria