President Rodrigo Duterte met with Moro National Liberation Front (MNLF) Founding Chairman Nur Misuari on Monday night.
The meeting took place at the Presidential Guest House in Davao City.
Misuari was accompanied by his wife Tarhata and son Abdul Karim.
Malacañang has yet to release a statement on the event.
In the past, Duterte had expressed his intention to talk with Misuari on the administration’s effort to change the form of government to federal system.
The first time Duterte, as president, met Misuari was in November last year in Malacañang.
The MNLF leader faces rebellion charges for the Zamboanga siege in 2013 where at least 200 persons were killed.
Misuari’s arrest warrant was temporarily suspended by the court last year and this enabled him to travel from Jolo to the Palace in Manila.
At that time, Presidential Spokesperson Ernesto Abella was asked if the Palace helped Misuari secure his temporary liberty.
Abella had said, “at the right time po, all those issues will be addressed. Ang mahalaga ay nag-usap sila (what is important is that they are talking). The President is addressing the historical issues.”