A bus carrying cruise ship tourists on a side trip through the mountains of northern Chile plunged off a cliff, killing 12 people, all of them U.S. citizens, authorities said. The bus was returning to the ship from a national park near the Bolivian border when it swerved off the highway and into a 260-foot canyon, said Maj. Carlos Valcarce, an Arica police spokesman.

A bus carrying cruise ship tourists on a side trip through the mountains of northern Chile plunged off a cliff, killing 12 people, all of them U.S. citizens, authorities said. The bus was returning to the ship from a national park near the Bolivian border when it swerved off the highway and into a 260-foot canyon, said Maj. Carlos Valcarce, an Arica police spokesman.

A bus carrying cruise ship tourists on a side trip through the mountains of northern Chile plunged off a cliff, killing 12 people, all of them U.S. citizens, authorities said. The bus was returning to the ship from a national park near the Bolivian border when it swerved off the highway and into a 260-foot canyon, said Maj. Carlos Valcarce, an Arica police spokesman.

A bus carrying cruise ship tourists on a side trip through the mountains of northern Chile plunged off a cliff, killing 12 people, all of them U.S. citizens, authorities said. The bus was returning to the ship from a national park near the Bolivian border when it swerved off the highway and into a 260-foot canyon, said Maj. Carlos Valcarce, an Arica police spokesman.

A bus carrying cruise ship tourists on a side trip through the mountains of northern Chile plunged off a cliff into a canyon Wednesday, killing 12 people, all of them U.S. citizens, authorities said. The bus was returning to the ship from a national park near the Bolivian border when it swerved off the highway and into a 260-foot canyon, said Maj. Carlos Valcarce, an Arica police spokesman.