Four Islamic militant groups in the Philippines have reportedly formed together to create a satellite of the Islamic State in Southeast Asia, pledging allegiance to caliphate in the Middle East.

A video reportedly released from the southern Philippines island of Mindanao shows a number of former rival Islamic terror leaders pledging allegiance to the Islamic State leader Abu Bakr al-Baghdadi.

The video had been circulating on Islamist forums on the dark web since January 4 but has since been removed, Rappler.com reports.

View photos Four formerly separate terror groups have reportedly formed as one and pledged allegiance to the ISIS. More

View photos The Filipino island of Mindanao in Southeast Asia. Source: Google Maps More

The new, self-declared ISIS province is situated in the south of the country, which has long been a hotbed to Islamic separatists along the Malaysian border.

Reports that agents from the Middle East were heading to the region have circulated for more than a year but they were dismissed as not credible due to the protracted armed conflict.

View photos The leaders of the different groups have declared an Islamic State satellite in the Philippines. More

Terror groups in the Philippines have been flying the same "black flag" used by ISIS for at least four years, according to Rappler.com, and claimed to have ties to ISIS for some time.

However, the Filipino military has downplayed links to the terror group in the Middle East.

View photos Some terror groups in the Philippines have been flying the ISIS 'black flag' for several years. More

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