MANILA — President Rodrigo Duterte declared a “state of lawlessness” on Saturday after a powerful blast ripped through a crowded night market in the city of Davao on Friday, killing at least 14 people and wounding more than 60.

Mr. Duterte said he was giving the military additional powers to carry out some police operations, like patrolling in urban areas and setting up checkpoints.

“I am declaring now a state of lawlessness,” Mr. Duterte said after visiting the scene of the blast on Saturday. “It is not martial law. It has nothing to do with the suspension of the writ of habeas corpus.”

Martin Andanar, the presidential communications secretary, said later that the declaration covered the entire nation, not just the southern Mindanao region, where the explosion occurred.