A concrete cowshed attached to the house of a local Trinamul leader blew off on Friday night after crude bombs stockpiled there exploded in a village of Birbhum’s Parui.

Sources said the explosion took place in the house of Hafizul Sheikh, booth president of Trinamul in Bheramari village of Birbhum’s Parui, which saw several clashes with crude bombs recently. Hafizul is absconding. Residents said the sound of the blast was heard at least 10km away.

“The sound of the explosion was even heard from the outskirts of Bolpur town. It led to us think several crude bombs exploded accidentally at the same time,” said a police source. Police have sent samples collected from the spot to the state forensic science laboratory.

“The bomb disposal squad collected several samples that we sent to the forensic science laboratory,” said Birbhum police chief Bhaskar Mukherjee. “A peaceful panchayat poll can’t be expected till the district is freed from bombs,” said a CPM leader in Bolpur.