By Laila Bassam DAMASCUS (Reuters) -Sectarian clashes escalated in Syria's predominantly Druze region of Sweida on Saturday, with machinegun fire and mortar shelling ringing out after days of bloodshed as the Islamist-led government struggled to implement a ceasefire.

Syrian interior ministry forces began deploying in Sweida on Saturday under a US-brokered deal intended to avert further Israeli military intervention in the Druze-majority province.Israel had bombed defence ministry forces in both Sweida and Damascus earlier this week to force their withdrawal after they were accused of summary executions and other abuses against Druze civilians during their brief deployment in the southern province.