evidence: - Philippine foreign secretary’s ‘Sabah is not in Malaysia’ tweet has prompted criticism from Kuala Lumpur and now both sides have summoned each other’s ambassadors - The decades-long row takes place even as both countries are working together to stamp out Islamic militancy in their shared waters Philippine Foreign Secretary Teodoro Locsin Jnr said on Twitter that "Sabah is not in Malaysia if you want to have anything to do with the Philippines", reacting to a US embassy item describing the area straddling both nations as part of Malaysia. "This is an irresponsible statement that affects bilateral ties," Hishammuddin said. "Sabah is, and will always be, part of Malaysia."