Miscreants set fire to a bus in the capital's Pallabi area and a gas cylinder-laden van on the Postogola Bridge in South Keraniganj on Monday evening.
The bus was set ablaze in the Mirpur-12 area around 9pm.
Pallabi police said officers were sent to the scene after receiving reports of the incident. Necessary action would be taken following an investigation.
Earlier in the evening, another bus was set on fire in the capital's Farmgate area.
Meanwhile, a gas cylinder-laden van parked on the Postogola Bridge in the Hasnabad area of South Keraniganj was set on fire around 6:40pm.
Police sources said the van was torched near the middle of the bridge, prompting the driver to flee the scene.
Firefighters from the Postogola Fire Service and police from South Keraniganj reached the spot around 7:10pm and brought the fire under control.
In a separate incident around the same time, a crude bomb was allegedly hurled at South Keraniganj Police Station. However, it did not explode.