ARMENIA, Colombia -- An earthquake shook western Colombia on Monday, killing at least 1,000 people and injuring scores of others as it toppled buildings and flattened neighborhoods across the nation's coffee-growing heartland, officials said.

The early afternoon quake had a preliminary magnitude of 6, according to the U.S. Geological Survey in Golden, Colo. Its epicenter was located in western Valle del Cauca state, 140 miles west of the capital, Bogota.Capt. Ciro Antonio Guiza, the deputy fire chief of Armenia, said rescue workers in his city were so strapped that many bodies remained on the street uncollected.

"There are more than 1,000 dead, perhaps more than 2,000 in Armenia alone," he said.

LDS Church missionaries serving in the area were all accounted for and in good health Tuesday, said church spokesman Dale Bills.

Elders and sisters serving in the Cali Colombia Mission reportedly have a week's supply of food and water.

A member of the Church of Jesus Christ of Latter-day Saints was reportedly killed in the quake. She was the mother of two children, Bills said.

One LDS meeting house was badly damaged, and three others are being used to shelter 300 church members whose homes were destroyed or seriously damaged.

The Cali Colombia Mission is sending out food, clothing and other necessities to be distributed to church members and possibly others.

Hundreds of bodies were trapped in 25 buildings that collapsed, Guiza said. In one 10-story apartment building alone, an estimated 60 people were crushed alive, Guiza said.

Some 60 percent of the city was destroyed, he said. Worst hit were the poor southern districts of this city, where "few of the homes remain standing."

He said 340 bodies were collected at a makeshift morgue, but it would be hours before hundreds more could be recovered.

"There's no way to measure this crisis," said Alvaro Pulido, Armenia's mayor.

President Andres Pastrana toured the damaged areas by helicopter and urged Colombians to show "solidarity . . . with this region." Donors formed long lines at Bogota blood banks and called in to telethons.

"The center of Calarca doesn't exist. Only the hospital was left standing," truck driver Jose Marcos told Radionet radio from the town, 90 miles west of Bogota.