Five prisoners have tested positive for Covid-19 in Loughan House Open Centre in Co Cavan, the Irish Prison Service has confirmed.

Four of the five prisoners who tested positive were on temporary release and were tested and quarantined upon their return to the detention centre, the prison service said.

There are no reported positive cases among staff so far, a statement added.

Testing of all prisoners and staff is now under way.

"The Irish Prison Service is working closely with Public Health and the HSE and contact tracing is ongoing," said the statement.

"As a precaution and in line with our National Infection Control Polices, the Irish Prison Service, in conjunction with the HSE, have commenced testing of all prisoners and all staff.

"An Outbreak Control Team (OCT) has been established to agree and oversee the appropriate actions to be taken to mitigate against further possible spread of the disease within the prison."