India, Aug. 10 -- The pilot-in-command of an Air India Airbus A320 that experienced a sudden loss of altitude during a Phuket-Delhi flight on August 4 has been subjected to further testing after an initial screening for psychoactive substances returned a result requiring confirmatory analysis, the Ministry of Civil Aviation said on Sunday.

The development comes days after Air India flight AI2379, operating from Phuket to Delhi, experienced a sudden loss of approximately 300 feet during cruise. The aircraft subsequently stabilised and landed safely in Delhi. A few passengers and members of the cabin crew reported injuries during the incident.

According to the ministry, both members of the flight crew underwent the prescribed psychoactive...