Angry Bahrainis preparing to bury a teenager killed in clashes with police in a Shiite village near the capital torched a police car, the interior ministry said on Saturday.
The ministry said the police car caught fire and burned on Friday night after being hit by a Molotov cocktail in the village of Mikshaa, west of Manama.
Witnesses said police used tear gas to disperse people who had gathered in protest for a second consecutive night Friday.
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Mahmud Mohsen, 15, died after being hit by birdshot on Wednesday, the main Shiite opposition bloc Al-Wefaq said. His funeral was to be held on Saturday.
The ministry said it has opened an enquiry into the death of Mohsen, whom Al-Wefaq claimed was hit when security forces opened fire on demonstrators.
That incident occurred during a ceremony to mark the death of a Shiite killed in an explosion on May 16.
Bahrain remains deeply divided three years after security forces crushed an Arab Spring-inspired uprising, with persistent protests sparking clashes with police, scores of Shiites jailed on "terror" charges and reconciliation talks deadlocked.
Attacks on the security forces have intensified in the Sunni Muslim-ruled kingdom, mainly in Shiite-populated villages surrounding the capital.