Authorities in Syria's Latakia province announced on Monday that the death toll has risen to four from the armed attack carried out by remnants of the ousted regime on Sunday.
It added that 108 people were injured in the violence.
The Syrian Defense Ministry announced on Sunday the deployment of military forces in the coastal cities of Latakia and Tartus in wake of the attack against security forces and civilians during protests.
State television said a member of the security forces was killed and others were injured while they were protecting protests in Latakia.
Head of the security forces in the Latakia province Abdulaziz al-Ahmed said the attack was carried out by terrorist members of the former regime.
Al-Ahmed added that masked gunmen were spotted at the protests and they were identified as members of Coastal Shield Brigade and Al-Jawad Brigade terrorist groups, reported the official SANA news agency.