Two passers-by killed and three others injured as the private car of Dr. Ariful Islam, head of Mechanical Engineering department of Shahjalal University of Science and Technology hit them.The incident took place around 11:30am on Saturday at SUST campus.The injured were taken to Osmani Medical College Hospital.The deceased were Mohammad Ataur Rahman and an unidentified man, aged about 60.Witnesses said the accident took place when the car of Prof Dr. Ariful Islam, head of Mechanical Engineering department of the university, knocked them, leaving the unidentified man dead on the spot.Prof Ariful was driving the car and the driver was sitting beside him while the accident took place, witnesses added.