The death toll from the fire at Hotel Bideshini in Tarapith rose to nine, including five victims from Meghalaya and four from Alipurduar.
Police arrested hotel owner Kalyan Pal and his son Prabir Pal following investigations that revealed major lapses in fire-safety arrangements.
Birbhum Superintendent of Police Vidit Raj Bhundesh confirmed that a locked front gate and a power outage severely delayed the evacuation of sleeping guests.