A 40-year-old factory worker was stabbed to death by unidentified attackers near his house here, police said on Sunday. Prem, a resident of north Delhi’s Sultanpuri, was stabbed around 7 pm on Saturday and died on way to hospital, police said. ‘Three stab wounds were found on his body,’ said a police officer, hinting that at least two assailants were involved. Police suspect personal enmity behind the murder as the assailants did not try to take away the victim’s valuables.