Security forces and protesters clashed in Bahrain's capital Manama and several other areas Tuesday, after people responded to a call from opposition groups for nationwide protests to mark International Workers' Day.
In Manama, several people were injure as police dispersed protesters. The February 14 Youth Coalition had called for 15 such protests under the slogan "A hand builds and a hand resists."
All protests began at the same time, 12:30 am at various villages and parts of the capital, DPA reported.
The group said the protests were meant as a sign of gratitude for the workers and to express solidarity with those who had been sacked from their jobs after last year protests.
The island country's majority Shiites have been taking to the streets since early last year, demanding more rights from the ruling Sunni royal family.
More than 2,000 people were sacked from their jobs in connection with the protests.