The Philippines city of Marawi has been liberated from ISIS-affiliated militants following a five-month standoff, President Rodrigo Duterte announced Tuesday.

"I hereby declare Marawi City liberated from the terrorist influence that marks the beginning of rehabilitation of Marawi," Duterte said while visiting the city, on the southern Philippines island of Mindanao.

Around 20 to 30 militants remain in the city, holding about 20 hostages, Maj. Gen. Restituto Padilla, spokesman for the Armed Forces of the Philippines (AFP), said at a press conference earlier in Manila. Fighting continues in Marawi, despite Duterte's declaration of liberation.