Twelve more inmates at the jail in St. Louis County have tested positive for COVID-19, bringing the number of current detainees with the coronavirus to 32.

CLAYTON — Twelve more inmates at the jail in St. Louis County have tested positive for COVID-19, bringing the number of current detainees with the coronavirus to 32.

Officials decided to test all 898 inmates after an outbreak was discovered on Oct. 2. As of Thursday, test results were pending for 103 inmates, St. Louis County Health Department spokeswoman Sara Dayley said.

Most of the inmates have no symptoms, but three were experiencing mild symptoms, Dayley said.

An inmate tested positive for the coronavirus during routine screening on Oct. 2, prompting the facility-wide testing. Officials are still trying to determine the source of the outbreak.

"Until the latest cluster of cases, DPH had detected no evidence of transmission of the virus within the facility," Daley said in a news release.

Prior to October, the jail had reported 37 cases among inmates and 24 among employees. All of the earlier cases were traced to those bringing the virus with them once they entered the jail.

Missouri is among several states seeing a surge in new virus cases. On Friday, the state reported 2,017 new cases and 17 additional deaths. Missouri has reported 152,571 confirmed COVID-19 cases and 2,459 deaths since the onset of the pandemic.