Syrian security forces and helicopters sprayed automatic weapons fire into a crowd of thousands of protesters demonstrating Friday after prayers in the northern town of Maaret al-Nouman, witnesses said.
At least four men were killed, activist Fadi Moustafa Sufi said.
An activist who has provided CNN with reliable information in the past said the crowd numbered in the tens of thousands when security forces on the streets and an attack helicopter aloft opened fire.
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