A man was killed and an Assistant Sub-Inspector (ASI) sustained bullet injuries after a dispute over a gold transaction between two groups escalated into a firing incident on Diwali night in Amritsar.The deceased has been identified as Pratap Singh. ASI Harnek Singh, posted at the B Division police station, was also injured after being hit by two bullets in the leg. His condition was stated to be serious.According to preliminary information, a dispute over a gold transaction had been simmering between the two groups. An argument over the matter soon escalated into a heated exchange.A short while later, some youths allegedly opened fire, triggering panic in the area. Pratap Singh was hit by bullets and died at the spot.ASI Harnek Singh, who was present at the scene, was also hit by two bullets in the leg. He was rushed to a hospital for treatment.The police have initiated an investigation into the incident. Further details, including the identity of the assailants and the circumstances leading to the firing, are awaited.