MILLIONS of Syrians faced freezing conditions without heating or tap water yesterday as Isis stepped up its scorchedearth campaign.

The extremist group released a video of its zealots blowing up the Hayyan Gas Company plant near Palmyra in eastern Homs province — the country’s largest gas supplier — on Sunday.

The attack, which cut supplies to the capital Damascus and other areas, was grimly well timed with a cold snap set to sweep the country.