It 's unclear who was behind the bombing . A car bomb explodes in Damascus , killing children , rebels say . Syrian army forces say they were attacked by rebels . Comment: The cease-fire is supposed to span the four-day Eid al-Adha holiday .
A car bomb explodes in Damascus , killing children , rebels say . Syrian army forces say they were attacked by rebels . Comment: The cease-fire is supposed to span the four-day Eid al-Adha holiday .