PHNOM PENH (AP) - Khmer Rouge (KR) guerrillas attacked a group of Pakistani U.N.

peacekeepers May 8 in Preah Vihear, injuring one soldier before being driven off

with mortar and small arms fire, U.N. military sources said.

The sources, who spoke on condition of anonymity, said the Pakistani soldier was

only slightly injured when his group's position came under fire at about 5 a.m. They

said the Pakistani troops responded immediately and drove off the guerrillas within

three hours.

Eleven U.N. personnel have died in a score of direct attacks in the past six weeks.

U.N. spokesman Eric Berman confirmed fighting had taken place for two days in several

districts around the Pakistani unit. He declined to give further details.

The KR is the prime suspect in most of the recent attacks. The guerrilla group is

boycotting U.N.-supervised elections set for May 23-28, and is suspected of trying

to scare people from the polls.

But a KR spokesman on May 7 denied that the group had attacked U.N. personnel, blaming

instead the Phnom Penh government.

The attack on the Pakistani unit came just five days after 300 Khmer Rouge guerrillas

raided the capital of neighboring Siem Reap province in the most serious attack since

the U.N. mission began a year ago.

In other incidents, a U.N. civilian police officer from the Philippines suffered

a fatal heart attack early May 7 during in an attack in the Southwestern province

of Kompong Speu, and on May 4, a Japanese U.N. policeman died in a ambush in the

Northwestern province of Banteay Meanchey.

A Japanese cabinet minister arrived in Cambodia May 11 to discuss safety measures

for Japanese peacekeepers. Japan's participation in the mission is being questioned

anew by those who say it violates Japan's war-renouncing constitution.