As machinery removes rubble, hopes for survivors from Colombian quake dwindle

Carlos Zambrano holds a picture of his missing brother during a vigil honoring the victims of the Colombian earthquake

CALI (COLOMBIA) - The noise of backhoes, cranes and bulldozers echoed across Colombia's quake-hit cities on Sunday as workers labored to remove rubble, though the chance of finding survivors was slim a week after the disaster.

Last Monday's 7.4 magnitude earthquake killed nearly 300 people and destroyed thousands of buildings. At least 140 people are still missing, authorities said.