Opposition activists trying to enforce a general strike against fuel price rises today set off pipe bombs and torched buses across Bangladesh.
Police fired tear gas and rubber bullets at some of the spontaneous demonstrations, which were accompanied by explosions and vandalism.
Police arrested dozens of those trying to enforce the 24-hour walkout, called by the Islamist Bangladesh National Party-dominated 18 Party Alliance.
The government added 9 per cent to the price of octane, diesel, petrol and kerosene for the fifth time in four years on Thursday despite the strike threat.
At least seven buses were set on fire in Dhaka and five pipe bombs set off at the city's university ahead of the strike.
The ruling Awami League blamed the opposition but the BNP said it was government agents and "miscreants" looking to frame the Islamists.
The driver of one bus was taken to hospital after his vehicle was pipe-bombed today morning.
At least 10 people were arrested following impromptu rallies where vehicles were set alight.
The strike shut down schools and shops in Dhaka. Most public transport did not run but officials said trains and ferries were not disrupted.
The 18 Party Alliance opposition alliance is dominated by the BNP and Jamaat-e-Islami, a number of whose leaders are on trial for alleged crimes against humanity during Bangladesh's 1971 independence war.
Last month left parties held a successful general strike against their bid to impose sharia law.