In a letter to lawmakers released by his office, Duterte said extending martial law was necessary in the southern region of Mindanao to contain an ongoing rebellion by Islamic State group supporters as well as a rising threat from communist guerrillas.
"I ask the Congress of the Philippines to further extend the proclamation of Martial Law and the suspension of the privilege of the writ of habeas corpus in the whole of Mindanao for a period of one year from 01 January 2018," the letter said.
Hundreds of gunmen rampaged through Marawi, the mainly Catholic Philippines' Islamic capital, in what authorities said was part of a campaign to establish a Southeast Asian caliphate for IS.
A US and Chinese-backed military campaign took five months to defeat the militants, with the conflict claiming more than 1,100 lives and leaving large parts of Marawi in ruins.
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Although Duterte declared in October that Marawi had been "liberated" and military chiefs said most militant leaders had been killed, authorities have continued to warn that others who escaped are regrouping and recruiting in Mindanao.
Martial law is an extremely sensitive issue in the Philippines, after dictator Ferdinand Marcos used military rule as a key weapon in holding onto power a generation ago.
Duterte, who has praised Marcos, has repeatedly said he may impose martial law across the entire nation.
Rights groups and other critics warn Duterte is destroying democracy in the Philippines with strongman rule and a war on drugs that has claimed thousands of lives.
But many Filipinos continue to support Duterte, believing tough tactics are needed to solve deep-rooted problems such as the decades-long conflicts with Islamist militants and communists.
Lawmakers are expected to vote on Duterte's martial law extension request this week, lower house majority leader Rodolfo Farinas told AFP.
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