Citing concerns over possible planned upheavals by inmates, the Florida Department of Corrections imposed a statewide lockdown Thursday and canceled weekend visitation at all of its prisons, work camps and annex facilities.

FDOC officials said they had “credible intelligence” that a small group of inmates at several prisons might attempt to disrupt operations and impact safety and security.

“In response ... FDC has taken steps to enhance the security of its institutions across the state this weekend,” agency spokeswoman Michelle Glady said in an email.

The duration of the lockdown is indefinite; updates will be posted on prison websites, Glady said. FDC officials also said the agency hopes to resume normal visitation “as soon as possible.”

All recreation and educational programs were canceled as part of the lockdown. Most inmates still can use telephones and access common areas. One FDC official, however, said more restrictive security protocols have been put in place at Franklin Correctional Institution in Carrabelle.

The move came amid reports of recent unrest and violence at prisons across the Panhandle, including FCI, the Wakulla Correctional Institution annex outside Crawfordville and Gulf Correctional Institution in Wewahitchka.