At least 34 people have died in Bangladesh and scores have been injured, most of them in firebomb attacks, amid rising political unrest fuelled by a stand-off between Prime Minister Sheikh Hasina and the main opposition leader. Begum Khaleda Zia, whose opposition Bangladesh Nationalist Party (BNP) boycotted the election in 2014, has demanded that Ms. Hasina and her government step down for a new vote under a caretaker administration. Ms. Hasina has refused, instead tightening her grip by arresting key opposition leaders as anti-government protests spread. Police said at least 25 people have died in arson attacks, including two on Friday. Eight more were killed in clashes with police, and one died following injuries from a crude bomb blast, they added.