United Nations observers say last week’s attack on the Syrian village of Tremseh seems to have targeted the homes of army defectors and activists.
Monitors visited the location where it is claimed that more than 200 people were massacred by forces loyal to President Bashar al-Assad.
The UN mission says the number of confirmed dead is “still uncertain”. They were due back in the village on Sunday to continue their investigation.
The Syrian Observatory for Human Rights claims a further 115 people were killed on Saturday during violence across the country.
Around 150 Syrians crossed into Turkey claiming they had fled their homes after getting caught up in the violence. Nine of the refugees were wounded and taken to hospital in the border town of Reyhanli.
In Istanbul, around two hundred protesters denounced the latest reported massacre in Tremseh. Syrian and Turkish demonstrators called for further help from other Arab countries.
Turkish Prime Minister Recep Tayyip Erdogan also blasted the mass killings, warning the Syrian regime that the people would “make them pay” for the reported massacre.
Syrian state TV blamed “armed terrorists” for the attack.