The dead fell victim to stab wounds and gunshot wounds, among other things in Pabna and Rangpur in the north and in the capital area of Dhaka.
At least 14 police officers are said to be among the dead, and another 300 police officers are reported to be injured, according to the police's press spokesperson Kamrul Ahsan.
Closed and blocked
On Sunday, the government announced that the country would have a public holiday from Monday to Wednesday. The country's courts will be closed indefinitely, and in addition, the internet has been shut down and apps such as Facebook and Whatsapp have been blocked.
UN Human Rights Chief Volker Turk said on Sunday that the "shocking violence" in Bangladesh must stop, while urging the government to stop attacking peaceful demonstrators.
"With a mass protest planned in Dhaka on Monday, and the ruling party's youth league mobilizing against the demonstrators, I am deeply concerned that there will be further loss of life and greater destruction," he said in a statement.
Quota system sparks outrage
The protests are primarily directed against the country's system of quotas for government jobs, which favors groups allied with the prime minister. The protests are also seen as being about corruption and lack of democracy. It is mainly activists who are demanding the prime minister Sheikh Hasina's resignation, as well as government-loyal groups that have clashed.
Bangladesh has been shaken by deadly clashes between police and demonstrators, many of them students, since mid-July. Previously, around 200 people have died as a result of the violence, and at least 11,000 people have been arrested.
The authorities have, among other things, introduced curfews to quell the unrest.