Area City Superintendent of Police Inderjeet Balsavar said that one Umesh Verma who sustained injuries in the clash, succumbed to his wounds at a hospital here, while undergoing treatment.
According to Congress corporator Jatin Raj's group, knives were freely used by the rival group inside the Vijay Nagar Police station where they have gone to lodge a complaint - a charge denied by police who had to call their colleagues from other police stations to discipline the two groups after they turned violent.
Prashant Nayak allegedly posted a photo in the WhatsApp group, which showed Sonia "washing utensils" with a satirical caption saying (Prime Minister Narendra) Modi has reduced Congress President to such a position, CSP Balsavar told PTI.
The two groups gathered at Ahimsa Chowk little after last midnight and a heated argument took place between them over Sonia.
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In the meantime, acting on a tip-off the police reached the spot and asked them to come to police station to sort out their differences, the CSP said.
He demanded police should make public the footage of CCTV camera at the police station to bring out the truth.
CSP Balsavar said to bring situation under control, police resorted to cane charge but denied that violence took place inside the police station.
The violence took place when the groups were en route to the police station, the CSP said.