Two major hospitals in South Korea’s capital suspended services to patients on Wednesday in a bid to stop the spread of MERS after four new cases of the deadly virus were reported.

Two major hospitals in South Korea's capital suspended services to patients on Wednesday in a bid to stop the spread of MERS after four new cases of the deadly virus were reported.

The new cases of Middle East Respiratory Syndrome included two who were in the same hospital where other patients with the potentially deadly virus, Seoul's health ministry said.

The others were a nurse at Samsung Medical Centre in Seoul - one of the epicenters of the outbreak - and a relative of a patient who was hospitalized  for an unspecified disease in a hospital in Pyeongtaek, south of Seoul, in  early June.

Out of 179 people confirmed to have caught MERS, five were infected through unknown transmission routes outside hospitals, which have until now been at the epicenter of the outbreak, the ministry said.

A total of 27 people have died in South Korea's MERS outbreak - the largest outside Saudi Arabia - while about 3,100 people were being held under quarantine at state facilities or at home.

Samsung hospital, where nearly 90 patients, visitors and medical staff have contracted the virus, declared a 10-day suspension of most services on June 14 to stem the spread of the virus.

But as the number of new infections has continued to grow, authorities have decided to extend the partial shutdown "indefinitely".

The outbreak at the hospital, which belongs to South Korea's top conglomerate Samsung group, prompted heir apparent Jay. Y. Lee to publicly apologize for "causing great pain and concern" on Tuesday.

Another major Seoul hospital, Konkuk University Medical Centre, on Wednesday also stopped admitting new patients and performing surgery after four cases were reported in recent days.