A person was killed and three others sustained serious injuries following a massive blast in the party office of Trinamool Congress (TMC) at Aushgram in Burdwan district of West Bengal here.
The incident took place at around 6 p.m. on 7 May.
However, the death has not yet been confirmed by the administration.
The injured people were rushed to the hospital for medical treatment.
After receiving the information of the incident, the officials of the Aushgram police station reached the spot launched a probe into the matter
However, no arrest has been made in the matter as yet.
A TMC worker has alleged that some unidentified bike-borne assailants hurled a bomb at the TMC office, while locals claim that people inside the party office were trying to make a bomb during which it accidentally exploded.
The incident has created a tense situation in the entire area.