Tighter security measures have also been put in place in the Philippine islands near the area, the statement added.

BBC: Malaysia stand-off with Philippine group

Also in the group, Bank of the Philippine Islands boasts the lowest delinquent-loan ratio in the country.

CNN: Asia's Memory Lapse

It formed part of the Sulu Sultanate - which once spread over several southern Philippine islands as well as parts of Borneo - before it was designated a British protectorate in the 1800s.

BBC: Malaysia stand-off with Philippine group

The village the Filipinos were occupying formed part of the Sulu Sultanate - which once spread over several southern Philippine islands as well as parts of Borneo - before it was designated a British protectorate in the 1800s.

BBC: Sabah stand-off 'turns deadly' as clashes break out