At least six fighters from the "Tahrir al-Sham" group were killed in clashes with supporters of former President Bashar al-Assad, the Britain-based Syrian Observatory for Human Rights said, quoted by the Associated Press and BTA.
According to the non-governmental organization, the fighters were killed while trying to detain a representative of the ousted government accused of issuing execution orders and other unlawful measures that affected thousands of prisoners.
"Tahrir al-Sham" led the sudden offensive that led to the removal of Assad. Activists and observers say dozens of Syrians have been killed in various reprisal attacks since then. Most of the victims are members of the minority Alawite religious community, a branch of Shiite Islam. Assad also belongs to the Alawite community.
In the capital Damascus on Wednesday, clashes broke out between Alawite protesters and Sunni counter-protesters. Gunfire was heard during the unrest, but no further details were immediately available.
There were also Alawite protests in the coastal Syrian city of Homs, as well as in Hama province. Some of the demonstrators demanded the release of soldiers from the former Syrian regular army who had been captured by "Tahrir al-Sham". Earlier, Agence France-Presse reported that at least one person was killed and five injured in the protests in Homs.
"Tahrir al-Sham" imposed a curfew due to demonstrations that erupted in connection with footage shared on social media of Islamist fighters burning an Alawite shrine in Aleppo.
Syrian authorities raided warehouses in Damascus on Wednesday, finding drugs such as Captagon and cannabis used by Assad's forces. The interim authorities said they had destroyed a million Captagon tablets and hundreds of kilograms of cannabis.
This week, some displaced Syrians began returning home in an attempt to return to their normal lives. Many were shocked to find their homes destroyed.