Islamic State militants cut off a key Syrian government supply line linking parts of the embattled northern city of Aleppo to the rest of regime-controlled territory across the country on Monday.

The fighting came a day after Islamic State suffered losses at the hands of pro-regime forces, including Iranian and Hezbollah fighters, who seized a major power plant and more than a dozen towns and villages east of Aleppo.

A day after a series of bombings on Sunday that targeted areas loyal to President Bashar al-Assad in the central city of Homs and the capital Damascus, the death toll from the attacks rose sharply to 184 from about 130 on Sunday, according to the Syrian Observatory for Human Rights, a U.K.-based opposition monitoring group. Islamic State took responsibility for the attacks. […]