Gurugram, Aug. 10 -- Nine of the 23 men named in an FIR for the murder of a 24-year-old man during an armed attack at a house in Karola village on August 6 have been arrested, police said on Sunday. The accused, residents of Jhajjar and Sonipat, were arrested by the crime branch, Farrukhnagar, from Azadgarh in Rohtak on Saturday. Police said the attack on the victim, Sagar, stemmed from an old rivalry involving the prime suspect, a neighbour of the complainant's family. The FIR was lodged under Section 103 (murder) of the Bharatiya Nyaya Sanhita on August 6 on a complaint by Sagar's family. The remaining accused are being investigated, police said. Two police officers were also suspended for alleged dereliction of duty. Police had initially said Sagar was shot dead, but a scene-of-crime team found no evidence of firing. An autopsy conducted on Saturday established that he died of stab injuries. According to police, Sagar's brother Shankar said an argument over an old rivalry on August 3 led to the prime suspect and associates allegedly assaulting family members. Sagar, who worked with a transport firm in Bengaluru, returned to Gurugram on August 6. Shankar received him at Pataudi bus stand, following which suspects allegedly followed them home and attacked them with weapons and sticks. Sagar died at a hospital. The prime suspect allegedly admitted planning the murder during interrogation, officers said. Meanwhile, police also seized a car allegedly linked to the crime. Family members initially refused to take Sagar's body until arrests were made. The prime suspect has one case involving possession or purchase of stolen property. Investigation is underway, they added....