The figure includes the sailor from Polonnaruwa.
Measures have been taken to quarantine the entire Welisara Navy Camp.
The Army commander says that it has been confirmed that they were infected while quarantining persons in Ja-ela and Suduwella areas.
He also noted that all sailors who went on leave in the past few days, after quarantine duty have been requested to report back immediately to undergo PCR tests.
Accordingly, the total number of Covid-19 cases found so far in the country has risen to 368.