Congolese media are reporting that journalist and academic Samuel Sirasi, who had gone missing last week, has been found alive but unwell.
Members of DR Congo National Press Union want the authorities to grant him protection and find the culprits, reports news site DRC Actu.
The Beni-based journalist went missing in the eastern city of Goma on 4 January, and was found at the weekend near a church in Goma's Karisimbi district. Locals gave him first aid and alerted organisations that had launched a search for him.
Mr Sirasi's health was in "very critical condition" at that point, his colleague Jaribu Muliwavyo at the Semuliki University of Beni is quoted as saying.
The journalist is currently being treated at an undisclosed hospital, according to Congolese media reports.