Two prisoners were found dead in the Madison County Jail over three days, authorities said Monday, but there was no indication the deaths were related.

A 48-year-old woman was founded unresponsive in a cell about 9 p.m. Friday in what authorities described during a news conference as an apparent suicide. Neither jail workers nor paramedics could revive the woman, who had been jailed since Jan. 27 on a probation violation, officials said.

Officers found a 28-year-old man unresponsive in a cell on Sunday morning, said Sheriff Kevin Turner. The man, who had been in jail about a day on two counts on murder related to a 2016 shooting in Huntsville, may have ingested drugs before being booked, authorities said.

Authorities did not immediately release the name of either person who died.