A peaceful demonstration by Bahraini activists turned violent after police stepped in to disperse the demonstrators.
According to Press TV, Bahrainis demonstrated in solidarity with political prisoners, calling on the Manama regime to release the inmates.
The protests were mainly held in Buri and Eker regions on Friday.
In Eker, a demonstration turned violent, with clashes breaking out between the protesters and the security forces. Regime forces fired tear gas and rubber bullets to disperse the crowds.
There have been almost daily demonstrations in many parts of Bahrain over the past months.
Demonstrators say sentences issued against the prisoners are unjust.
More than three years since the popular uprising began in Bahrain, the regime crackdown continues unabated.
On September 21, a Bahraini appeals court upheld an earlier ruling that handed five-year imprisonment sentences to nine Shia activists.
Attorneys for the Shia activists, however, insist that the defendants are innocent and were forced to make confessions regarding the charges against them.