Engineers wore black badges across the country on Tuesday demanding trial of the killers of their fellow Delwar Hossain, executive engineer of Gazipur City Corporation. They wore black badges between 10:00 am and 5:00 pm as a part of the programme announced by the Institution of Engineers, Bangladesh on May 30 in protest against the murder. A press release issued by the IEB said that banners were hung at all the centres and sub-centres of the IEB, all the engineers? establishments and universities to press home the demand. Engineer Delwar Hossain was found dead on May 12 in the Beribadh area under Turag Police Station in the capital, a day after he went out of his Dhaka residence for his GCC office. Police arrested an assistant engineer of GCC and two of his associates and said that Delwar was killed for his honesty as he did not approve many work of the corporation for being substandard. IEB President Md Abdus Sabur and general secretary Khondoker Manjur Morshed said that Delwar was killed to hinder development of the country. They thanked the government for arresting three in the case and demanded further investigation to unmask the real criminals behind the murder and their punishment within shortest possible time. They also demanded safe workplace for engineers.