Rebels have attacked a village in eastern Syria, killing dozens of Shia Muslim residents, most of them pro-government fighters, activists say.
The UK-based Syrian Observatory for Human Rights (SOHR) said at least 60 people died in Hatla on Tuesday.
The attack appeared to be retaliation for a raid on a rebel position by people from the village, it added.
Meanwhile, a government helicopter has reportedly fired three missiles at the northern Lebanese border town of Arsal.
Lebanese security officials said one of the missiles had struck the town centre. One told the AFP news agency several people were wounded.
Arsal is a predominantly Sunni town about 15km (9 miles) from the Syrian border that is home to some 27,000 Syrian refugees.
It is not far from the strategically important Syrian town of Qusair, which was recaptured by the army last week with help from fighters from the Lebanese Shia Islamist movement, Hezbollah. . .