A truck accident on the EN257 highway between Alvito and Viana do Alentejo in Portugal has left one person injured. The incident, reported at 8:18 AM local time, involved a heavy goods vehicle leaving the roadway. Authorities, including the GNR (National Republican Guard) and Civil Protection, responded to the scene. The EN257 is currently blocked, and traffic is being diverted onto alternative routes. The extent of the injuries sustained by the individual is currently unknown. Authorities are working to clear the wreckage and reopen the highway as quickly as possible.