At least seven people have been burned to death and 15 others injured, some seriously, in a petrol bomb attack on a bus in eastern Bangladesh.
Police said the bus had been full of sleeping passengers when it was attacked near the town of Chauddagram.
It is the latest in a spate of attacks on buses, lorries and cars since anti-government protests began last month.
Opposition leader Khaleda Zia called for the protests on the anniversary of last year’s disputed election.
However, she has denied that her Bangladesh Nationalist Party (BNP) and its Islamist allies are behind the firebombings.
BBC Bangla’s Sayala Roksana in Dhaka says at least 50 people have been killed and 1,000 injured in violence since 5 January. More than 7,000 opposition activists have been arrested.
Farukh Hossain, one of the survivors, told the BBC that most passengers were asleep when the bomb was thrown.
Police officials said authorities had raided nearby villages but no arrests had been made.