A "terrorist attack" on a pro-government television channel near Damascus killed three staff early Wednesday, the state SANA news agency reported.
The assailants also ransacked the offices of the Al-Ikhbariya channel, the news agency added, without immediately giving more details on the attack.
The channel remained on the air despite the reported assault, a fact hailed by state television.
"Despite the barbarity of the terrorists' crime and their attempt to silence the voice of Syria... Al-Ikhbariya is still broadcasting," it said in a commentary.
A pro-government television channel was among the organizations hit by the latest round of EU sanctions against the Syrian authorities imposed Monday. The 27-nation bloc had already imposed sanctions on the state broadcast media.
Washington put the state broadcaster on its sanctions blacklist in March.