- Eyewitness: "The jets arrived over Idlib and we heard three explosions"
- At least 28 children are among the dead
- The US and Russia agreed to a ceasefire plan that starts Monday
(CNN)At least 90 people were killed in airstrikes that rained down on northwestern Syria on Saturday and Sunday, a rights group said. The surge in violence came just hours after the US and Russia announced a new ceasefire plan.