COIMBATORE:Seven construction workers, working on a building renovation project in a college at Arasur near Sulur, suffered grievous injuries as a scaffolding collapsed on them on Friday. Three of the workers had climbed atop the scaffolding while the others were standing below, when it collapsed. R Sakthivel (37) from Erode, A Arun Kumar (25) from Salem, S Kandasamy (36), A Chinnasamy (25), A Sokkappan (40), K Thangapaiyan (35) from Erode and C Kannan (39) from Salem were hurt. Arun Kumar suffered a fracture on his spine, while another worker’s leg was fractured. A few others had also suffered mild injuries and were being treated at a private hospital. Based on a complaint, police registered a case under sections 228 (negligent conduct with respect to pulling down or repairing buildings), 337 and 338 (causing hurt by act endangering life or personal safety of others) of the IPC against contractor S Arivudai Nambi (47), engineer S Kathirvel (30), and D Chelladurai (25), the supervisor. Police said that the three men are absconding.