Vikram Dhamija, a businessman in the city, who was critically injured after assailants stabbed him on Monday evening, died while undergoing treatment in a corporate hospital late on Tuesday evening. Meanwhile, the crime wing of the city police have got a few vital clues in the case. Initial investigations point to the involvement of a gang from Bihar, Jharkhand or Chhattisgarh. The gang appears to have some local connection and it is learnt that two persons here have been taken into custody for questioning. The businessman stays in a posh apartment on Beach Road and maintains an office in the front room of his flat. The incident occurred at around 4.30 p.m. on Monday in his office room and Mr. Vikram was stabbed at least four to five times. His wife suffered three stab injuries, while his driver, who was present at that time, also received a stab injury. While Vikran died on Tuesday, his wife and the driver are out of danger. As per the CCTV footage of the apartment, six men in two batches were seen entering the apartment. While four took the elevator to reach his flat, two remained in the cellar. The footage also shows the four assailants running out of the apartment after the attack and one is seen running carrying the murder weapon wrapped in his blood stained shirt. All the four used the steps instead of the elevator. The investigation team is headed by DCP (Crimes) Shemushi Bajpai. According to DCP (Law and Order) K. Fakeerappa, the CCTV footage in the apartment and the one present in the victims house have been collected and the technical team of the police is examining them. Police sources say that it could be a robbery case that led to the attack. Vikram, who is in his mid forties, is a well-known businessman and a second-generation resident of this city. He is an avid golfer and police sources say that he would have resisted their attempt of robbery and that possibly would have led to the attack. "But we are not ruling out the rivalry angle," said a police officer in the investigating team. The attack on the businessman has made the residents in the posh locality jittery and many resident associations are beefing up security, including installing new CCTV cameras and getting the defunct ones repaired. According to Mr. Fakeerappa, CCTV cameras play a vital role in identifying criminals and help the police crack cases. As per the A.P. Public Safety Act all apartments and public places should come under CCTV coverage.