"More than one person's voice has been heard from inside," an official said.
Authorities announced that the death toll rose on Monday to 3,535 while Venezuelans are left alone to recover loved ones as international rescue teams depart.
Venezuelans searched for survivors beneath collapsed buildings Thursday and rescue teams raced to northern areas rocked by a pair of powerful earthquakes that officials say killed at least 235 people and left more than 200 trapped.
A powerful 7.1-magnitude earthquake followed by a 7.5-magnitude quake shook Venezuela on Wednesday, collapsing buildings in the capital of Caracas.
A 21-year-old woman died when two rope jumping instructors threw her from a bridge without first harnessing her to security equipment in Brazil.