Syrians fleeing to Lebanon have reported that armed gangs identifying themselves as members of Hezbollah have set up checkpoints and conducted occasional abductions along roads near the border.
A Lebanese member of parliament says the cases were isolated and that Hezbollah has promised to get to the bottom of the incidents. But Lebanon has rebuked US calls for refugees - including unarmed opposition fighters - to be allowed free movement.
Al Jazeera's Sue Turton reports from northern Lebanon.
