Air India's deadly plane crash that killed at least 270 people has triggered a wave of speculation about what led to the world's worst aviation disaster in a decade, but authorities are slowly narrowing down areas of investigation.

AHMEDABAD – In the wake of the devastating Air India plane crash in Ahmedabad, U.S. aviation safety officials have joined the ongoing investigation into the disaster that claimed at least 271 lives.

A high-level meeting on civil aviation security, led by Union Home Secretary Govind Mohan, is scheduled to take place on June 17. Sources told ANI that the meeting will have top officials, including the Civil Aviation Secretary,