Bahraini protesters attacked a police station with petrol bombs on Thursday and riot police responded with teargas and stun grenades after a funeral march for a man who was killed in clashes during the Gulf Arab state's Formula One race last week.
The clashes in the Manama neighbourhood of al-Bilad al-Qadeem came after thousands of mourners visited the grave of Salah Abbas Habib, 36, who was found dead on Saturday after he disappeared during fighting with police.
Petrol bombs set the police station's wall ablaze and the clashes spilled onto a main highway, holding up traffic for up to an hour, Reuters witnesses said.
Habib's battered body was buried by his family in the village of Shakhura on Monday, with extensive birdshot wounds which friends said he sustained during clashes with police he took part in the previous evening.
The main opposition party Wefaq says Habib's body showed signs of torture, including multiple fractures and birdshot pellets that appeared to have been fired at close range. The interior ministry has said it would establish what happened to Habib.
Wefaq says his death takes to 81 the number of people killed since a pro-democracy uprising erupted in February last year after successful revolts in Egypt and Tunisia. That figure includes 35 who died during the uprising and crackdown, including five security personnel.