Four persons suffered bullet injuries during a clash between Trinamul and BJP activists at Kaikhali village of Nadia’s Hanskhali late on Saturday night.

The injured, two each from the BJP and Trinamul camps, were rushed to the Nadia district hospital in Krishnagar, where another clash occurred, as a group of ruling party workers, led by a former MLA, allegedly tried to prevent the injured BJP workers from getting admitted to the hospital.

The situation was brought under control by police.

The injured were identified as Trinamul’s booth president Shila Biswas, 51, her son Subhabkar, 28, BJP activist Tapan Biswas, 53, and his son Debarshi, 29.

District hospital sources said Shila received a bullet in her stomach and has been shifted to a Calcutta-based private hospital. Tapan Biswas and his son, shot in their legs, were also shifted to a Calcutta hospital on Sunday.

Police have begun a case based on two complaints. Till Sunday evening no one was arrested. A large police team has been deployed in Kaikhali.

Police said that trouble began at 10pm, when Trinamul’s Shila and her aides accused BJP’s Bimal of selling bicycles under the state’s Sabuj Sathi scheme meant for students for free. He accused them of conspiring to malign him.

The altercation turned into a clash, and several rounds of gunshots were heard.

Trinamul's former MLA Samir Poddar alleged Bimal’s brother fired at Shila and her son was injured in trying to save her. The BJP's Ranaghat MP Jagannath Sarkar claimed it was an attempt to kill Bimal, “who is instrumental to our party’s success in the area”.

A senior police official in the Ranaghat police district said: “The situation is under control. We have begun a probe and expect to arrest the culprits soon.”