Miscreants torched four polling centers in three upazilas of Rajshahi early Friday ahead of the national elections to be held on Sunday.
The centers are Jutanshi Government Primary School and Arani Jhina Government Primary School in Bagha upazila, Motihar High School in Mohanpur and Akkelpur High School in Bagmara.
Mojibor Rahman, the headmaster of Motihar High School, said the miscreants torched a classroom and several benches and tables were damaged in the fire.
Bagmara Police Station officer in-charge Orbind Sarker said miscreants set Akkelpur High School on fire and later, locals brought the fire under control.
Two unexploded cocktails were found in front of the voting center, he said.
The district's additional police superintendent, Rafiqul Islam, said they began an investigation into the incidents and legal actions will be taken after probe.
Shakhawat Hossain/SU