JAKARTA, Nov 10 (Reuters) - An Indonesian man from Riau province on Sumatra island has died of bird flu, taking the country´s death toll from the disease to 91, a health ministry official said on Saturday.

It was not clear if the 31-year-old man who died on Tuesday had been in contact with sick fowl, the most common way of contracting the disease, health ministry spokeswoman Lili Sulistyowati said by telephone text message.

(Reporting by Telly Nathalia, Writing by Ed Davies)