Six BJP workers suffered injuries in an explosion in South 24-Parganas’ Gosaba late on Friday night, with the police claiming they had been making bombs and the saffron party alleging an attack by Trinamul-backed goons.

Villagers said that around 11.30pm on Friday, they heard a deafening sound at villager Balaram Mandal’s home in Arampur-Kantakhali, Gosaba. They found the home in flames and the injured unconscious.

Villagers took the injured Sovon Debnath, Bikram Sil, Sujan Kurali, Mahadeb Nayak, Arpan Debnath and Anal Mandal to Gosaba rural hospital from where they were referred to Canning subdivisional hospital. Later, four of them were admitted to Chittaranjan hospital in Calcutta.

A senior police officer said: “Prima facie it appears that the injured persons were making bombs when the blast occurred by accident. There are claims that the victims had been attacked by goons but we are yet to arrive at any conclusion. A probe is on.”

No arrest was made till Saturday evening. A forensic team visited the site earlier in the day, but refused to comment.

Trinamul MLA and party nominee Jayanta Naskar alleged that a section of the BJP leadership with the support of goons had been trying to unleash terror in the area. BJP leader Sanjay Nayak accused the police of trying to malign party with the support of the ruling Trinamul.