The samples will be sent to the National Institute for Disease Control in Delhi and the National Institute of Virology in Pune.

'Orders have been given to report the suspected cases immediately to the concerned authorities and quarantine the patient,' the official added.

According to the official, the spread of the disease would be very fast in the armed forces as the troops live in close proximity.

Six people have succumbed to the virus since the first death was reported in the country Aug 3. On Sunday, the health ministry said the total number of people infected by swine flu was 864. Of these, 523 have been cured and discharged from designated hospitals.