BANGKOK (Reuters) -Signs of life were detected in the ruins of a skyscraper in Bangkok on Monday as efforts intensified to find people trapped three days after a massive earthquake in Southeast Asia that killed at least 2,

At least 15 people are thought to still be alive and trapped under the rubble of a Bangkok skyscraper that collapsed after a massive earthquake hit Myanmar and Thailand. Rescuers say they have detected signs of life and communicated with some survivors under the 10-storey tall mountain of debris.

Several people were killed in a building collapse and dozens more were missing as of Friday evening in Thailand, the authorities said.

A Chinese-backed contractor is facing an investigation over the collapse of a 33-floor skyscraper in Bangkok in Friday’s earthquake.

The Chinese embassy in Bangkok has called for full cooperation with the Thai authorities’ investigation into the State Audit Office collapse.

The governor of Bangkok says authorities are investigating why a high-rise building under construction collapsed during an earthquake that otherwise caused limited damage in the Thai capital.

Large quakes produce shaking at a variety of frequencies. Some waves can travel hundreds of miles, and are amplified by local geological conditions.

The Sathorn Unique Tower, a 49-story building abandoned for decades in Thailand's Bangkok, recently went viral on social media after miraculously surviving a 7.7-magnitude earthquake in Myanmar that shook Southeast Asia.