Philippine President Rodrigo Duterte's trust ratings declined slightly in an opinion poll in the first three months this year, crimped by what political analysts call his deadly war on drugs that killed poor slum dwellers.

Seventy-six percent of 1,200 Filipinos surveyed by pollster Pulse Asia said they trusted the firebrand leader, for a drop of seven points from Dec. 2016. His first quarter performance rating of 78 percent also slipped, from 83 percent earlier.

The capital, Manila, and the biggest island of Luzon showed the largest drop in the president's trust and performance ratings, as well as among poor respondents, said Ana Maria Tabunda, the firm's research director.