beirut air strike kill 19 people village syria rebel stronghold idlib overnight rescue service syrian observatory human right say wednesday strike pound maar shureen northwestern idlib province injure 25 people britain-based observatory say dead include seven children say war monitor group add syrian government russian aircraft strike village russia defence ministry deny involvement say statement carry ria news agency jet fly area immediate comment syrian military say target militants idlib civil defense rescue service know white helmets operate rebel territory say social media fierce bomb kill 19 people overnight two consecutive strike ... second strike come shortly rescue team arrive mustafa youssef head idlib civil defense say damascus government lose idlib insurgents take provincial capital 2015. since become province fully opposition control populate insurgent-held part syria hayat tahrir al sham islamist alliance spearhead former al-qaeda affiliate syria dominant rebel force idlib raise fear among civilians rebel factions province could come attack turn major battlefield thousands civilians fighters pour idlib past year buss towns cities syrian troop seize help russia iran-backed militias government force ally step air strike opposition towns hama countryside southern part idlib rebel say last week province border turkey part russian-brokered de-escalation agreements seek shore ceasefires part western syria turkey long back syrian rebel factions set observation post idlib october deal russia iran reduce fight turkish president tayyip erdogan say military operation idlib largely complete deployment also see partly aim contain kurdish influence nearby northern syria strike kill 19 rebel village syria 's idlib observatory rescue service