LIMA, Peru (AP) _ Alejandro Toledo announced Thursday he will not participate in the May 28 runoff against President Alberto Fujimori, and he called for a postponement to resolve alleged election irregularities.

``We have requested an extension until June 18,'' Toledo said at a news conference. ``I have come to tell you that Peru Possible will not participate in the election on May 28.''

Peru Possible is the name of Toledo's political movement.

He also said he would not participate in a runoff on June 18 if the election irregularities that marked the first round were not eliminated.

Hours earlier, protesters yelling ``Get out, tyrant!'' stoned Fujimori's vehicle at a campaign rally in Ayacucho on Thursday after the Organization of American States demanded a postponement of Peru's election runoff.