Rourkela: A 38-year-old construction worker was killed after an iron rod fell from the fourth floor of an under-construction banquet hall and struck him on the head at Kantabanji in Balangir district on Thursday. His family has demanded Rs 40 lakh compensation, alleging that adequate safety gear was not provided to workers at the site.The deceased was identified as Bhaba Grahi Patel, a resident of Burobahal village under Bangomunda police station limits. The accident occurred at the construction site along the Kantabanji-Bangomunda road.Patel was working at the site when the iron rod reportedly fell from the fourth floor and hit him on the head. He was rushed to Kantabanji community health centre, where doctors declared him brought dead. His body was subsequently kept in the morgue.Kantabanji police reached the spot and launched an investigation into the circumstances leading to his death. “We have registered an unnatural death case and an investigation is underway,” said Gopal Chandra Karna, inspector in-charge of Kantabanji police station.