Philippines intelligence sources confirmed that Azzimudie, 74, died of cardiac arrest in Tawi Tawi province in southern Philippines on Tuesday.
Azzimudie died at his home at Tubig Indangan village in the town of Simunul in Tawi-Tawi province.
Azzimudie or Agbimuddin, the younger brother of the late Jamalul Kiram, who was the self-styled Sulu Sultan Jamalul Kiram, led a group of armed men to invade Tanduo in February 2013.
He disappeared without a trace after he “fled” Lahad Datu on March 11 as Malaysian security forces recaptured Kampung Tanduo, Sabah in a massive offensive.
A total of 73 intruders were killed (59 bodies have been recovered) in the nearly eight-week armed showdown with Malaysian security forces.
Malaysian police have arrested 184 people and charged 31 with various criminal offences, including waging war against the Agong. Their cases are ongoing in court.
Azzimudie was a former assistant district officer of Kudat, Sabah in the early 1970s.(THE STAR)