BJP leaders have uploaded video clips featuring purported state police officers with pump-action guns to suggest that pellets that killed a party supporter in Siliguri on Monday were fired by the law-enforcement agency.

“The police in Bengal have lied. We have at least 10 such videos to prove that they use pump action guns. This is just a sample video. We will even knock the doors of the Supreme Court to get justice. They have killed our supporter and now trying to conceal facts,” Kailash Vijayvargiya, the BJP national general-secretary and Bengal minder, tweeted along with a video clip.

The police had said on Tuesday that the post-mortem report suggested Ulen Roy succumbed to injuries caused by pellets from a shot gun. The police had added that they did not use such firearms.

Trinamul leader and minister Gautam Deb said the gun seen in the video posted by Vijayvargiya was used to fire rubber bullets.

“The BJP is known for fabricating real facts. The video that Kailash Vijayvargiya has posted, claiming that the police had fired pellets, does not stand. The gun shown is used for rubber bullets,” the minister said.

BJP information technology department chief Amit Malaviya also uploaded a video clip on social media.

“Really? You don’t use shotguns? Then what is this? You killed BJP worker Ulen Roy in cold blood…. Truth is catching up,” tweeted Malaviya, addressing the state police.

The police did not officially comment on Wednesday.