Reports from the area said that at least three people were injured when a landmine exploded and the injured were admitted to hospital.HALO is the world’s oldest and largest humanitarian landmine clearance organisation and it is involved in mine clearance in parts of the north. An explosion occurred at a demining site in Muhamalai, officials told the Colombo Gazette this afternoon.The explosion had occurred at a site where HALO Trust is involved in de-mining work, Halo Trust officials said but did not wish to provide further details.