South Korea reported three more cases of Middle East Respiratory Syndrome (MERS) Sunday, bringing the total number of people diagnosed with the disease here to 169, Yonhap news agency reported.

The new cases, including a medical doctor from Seoul's Samsung Medical Center, came from those who have already been suspected of infection for coming in close contact with MERS patients, according to the Ministry of Health and Welfare.

The ministry maintains no community transmission of the disease has occurred here with nearly all transmissions taking place in hospitals.

Some 90 hospitals, including the Samsung hospital, have been identified as sources of infection. The list of MERS-affected hospitals is daily updated and is available at the ministry's Web site.

As of Sunday, the number of people in isolation for suspected cases came to 4,035, down from 5,197 on the previous day. So far, some 8,800 people have been released from isolation after they showed no symptoms of MERS for more than the known maximum incubation period of 14 days for the disease.

Currently, the country's death toll from the disease remains at 25 with the latest fatality confirmed late Saturday.