Two buses parked by the roadside were set on fire near Phulkali intersection in Mirpur-12, Dhaka, on Wednesday morning.
The incident took place shortly after 6am during rainfall, when several unidentified people allegedly set fire to the buses and fled.
The affected vehicles belonged to Bikalpa Paribahan and Abhijat Paribahan, police and local sources said.
Local residents rushed to the scene and brought the fire under control by pouring water. However, the interior seats and body of the Bikalpa Paribahan bus were completely gutted. The other bus sustained damage to its rear windowpanes, several seats and seat covers.
No casualties were reported.
Pallabi Police Station Officer-in-Charge Jalal Uddin confirmed the incident, saying the suspects had been identified through CCTV footage and other sources. Police expect to bring them to justice soon.