Former U.S. Rep. Jesse Jackson Jr. has been transferred from a North Carolina federal prison to a prison camp in Montgomery, Ala., the Chicago Sun-Times reported Saturday.

According to Chicago's WGN-TV, Jackson's family says the move is "a medical situation." The Sun-Times reported, citing a source they did not name, that the 49-year-old former Chicago congressman had a conflict with prison officials and was placed in solitary confinement for four or five days over a month ago.

Jackson had been “advising other inmates in North Carolina about their rights in prison,” according to the Sun-Times. He was ultimately cleared of doing anything wrong after a hearing and then asked to be moved to a different facility.

Jackson entered prison last year after he plead guilty to illegally spending $750,000 in campaign money. His family has visited him in prison since the incident, and they are “concerned about Jackson’s welfare,” the Sun-Times said.

Read the full story in the Sun-Times here.