Marquez was reporting from Pearl Square in the capital Manama when he was surrounded and beaten with billy clubs.
“There was a canister that looked like — No! No! No! Hey! I’m a journalist here!”
Marquez yelled. “I’m going! I’m going! I’m going! I’m going! … I’m hit. I just got beat rather badly by a gang of thugs.”
Marquez was not seriously injured, though he was hit several times and had his camera taken away from him.
Marquez is openly gay but that doesn’t appear to be what triggered the incident. Bahrain is more tolerant of homosexuality than other countries in the Middle East.
In recent weeks, several other attacks against Western journalists have taken place in the region.
In Cairo, CBS News correspondent Lara Logan was beaten and sexually assaulted the night Hosni Mubarak resigned as president of Egypt.
CNN host Anderson Cooper and ABC News’ Christiane Amanpour were also attacked.