New Delhi, Jan. 20 -- A day after a sweeping deal was announced between the Syrian government and the country's main Kurdish-led force, the agreement appeared to be falling apart Monday.

After new outbreaks of clashes Monday, the Kurdish-led Syrian Democratic Forces issued a statement calling for "all of our youth" to "join the ranks of the resistance."

"Just as our comrades in 2014 forged a historic resistance in Kobani and turned it into a graveyard for (the Islamic State group) . today we affirm with the same resolve that we will turn our cities . into a graveyard for the new (IS)-minded people who are directed by Turkey," it said.

Earlier in the day, Syrian government forces and Kurdish fighters clashed around two prisons housing m...