The Centre for Health Protection has confirmed two cases of Legionnaires' disease involving a 50-year-old Mainland man and a 51-year-old man from Tseung Kwan O, bringing this year's total to six.

The Mainlander developed fever, headache, cough and malaise on May 7. He was admitted to Canossa Hospital on May 11. He is now in a stable condition.

The second patient developed fever and a cough on May 6. He was sent to Tseung Kwan O Hospital on May 10 and is now in a stable condition.

The family members of the two have not developed any symptoms.