Dhaka (AFP) - Three more opposition activists were killed in a new bout of political violence in Bangladesh Friday after the US voiced grave concern about the unrest and slammed a spate of "unconscionable" firebombings.
Four people, including a child, also died and 15 were injured when suspected anti-government protesters threw a petrol bomb at a packed bus as the death toll from a month of unrest rose to 70.
Ashraful Islam -- chief of police in the northern district of Gaibandha -- said protesters attacked the bus just before midnight, adding that two of the wounded were critical.
Police shot dead an Islamist protester from the Jamaat-e-Islami party and injured two more after they threw a molotov cocktail at a police van in Rajshahi, northwest of Dhaka, after midnight Friday, local police chief Alamgir Hossain told AFP.
"Three police constables were injured in the clashes," he added.
Another Jamaat supporter was killed in the western city of Jessore during a shootout with officers, police told reporters. Jamaat said another activist was shot dead elsewhere, bringing Friday's toll to seven.
Rights groups say the shootouts are fake and are nothing but cold-blooded executions of opposition activists.
A total of 70 people have been killed in political violence in the last month, according to an AFP tally, as an opposition alliance tries to force the resignation of Prime Minister Sheikh Hasina.
Many of the victims have been travelling on trains or buses that have been firebombed by opposition activists as part of an ongoing transport blockade designed to bring the government to its knees.
The US State Department issued a statement late Thursday saying there could be "no justification" for such violence while also calling on the government to allow peaceful protests.
"The United States is gravely concerned by the ongoing unrest and violence in Bangladesh," deputy state department spokesperson Marie Harf said in the statement.
"We deplore the unconscionable attacks including bus burnings, throwing incendiary devices, and train derailments that have killed and wounded innocent victims.
"There is simply no justification for such actions in a democratic Bangladesh," she added, urging the government "to provide the necessary space for peaceful political activity".
The unrest began when security forces confined main opposition leader Khaleda Zia to her offices after she threatened to lead a mass rally against Hasina's government on January 5, the first anniversary of disputed polls.
A confined Zia then called for a nationwide blockade of roads, railways and waterways in an effort to topple Hasina's government and pave the way for a new polls under a neutral government.
The blockade unleashed unprecedented violence with anti-government protesters targeting buses and trucks with petrol bombs.
The government has deployed thousands of security forces nationwide and arrested some 10,000 protesters as part of a crackdown on the unrest.
Thousands more demonstrators have gone into hiding and Zia has remained holed up in her office, after her internet, mobile phone and satellite television connections were cut.