An assistant sub-inspector (ASI) and two others were injured by explosives hurled at a police vehicle at Malibagh intersection in Dhaka.
The blast occurred around 8:55pm on Sunday.
The injured are: a female ASI, Rasheda, and two rickshaw-pullers. The injured were taken to Dhaka Medical College Hospital (DMCH) for treatment.
Confirming the incident, Md Syed Ali, Paltan police station SI, told Dhaka Tribune: "A police patrol car was going to Ganabhaban to pick up female police officers, when an explosive was thrown at the back of the car."
The type of explosive could not be determined, Syed Ali added. "The car was not CNG-powered.It was diesel-run."
The fire was put out with a fire extinguisher brought from a nearby CNG station, the ASI said.
Kamrul Islam, Fire Service duty officer, said: "We went to the scene as soon as we were informed. However, by the time we reached, the fire had already been put out."
The attack comes on the same day Dhaka Metropolitan Police (DMP) Commissioner Asaduzzaman Mia assured citizens of tightened security ahead of Eid-ul-Fitr.
Earlier, on April 30, two traffic police constables and one community traffic member were injured in a blast in Dhaka's Gulistan area,a few hours after two people were killed in a blast in a suspected militant den, also in Dhaka.
According to a statement of the Site Intelligence Group, the Islamic State claimed the attack.
