Wednesday's event came one day after the Saudi forces raided Awamiyah in the east, killing a Bahraini Shiite man and injuring 26 others.
The Saudi Interior Ministry identified the victim as Ali Mahmoud Ali Abdullah, claiming that the man had opened fire on Saudi troops.
Local activists, however, dismissed the ministry's assertion, saying that Abdullah was not armed, Press TV reported.
A witness to the incident also said having seen the body of a second individual lying in the street, adding, "People said an armored vehicle hit him.”
Awamiyah, located in Saudi Arabia’s restive Eastern Province, has witnessed peaceful demonstrations since February 2011.
Denouncing Riyadh’s oppressive policies against the country’s Shiite minority, protesters are calling for political reform and an end to widespread discrimination.
Several people have been killed and many others injured or arrested during the rallies.