Indian investigators are examining evidence linked to an Air India flight that plunged sharply mid-air last week, authorities said Tuesday, as local media reported the pilot had tested positive for marijuana. Indian media reports, meanwhile, said the chief pilot had failed a second drug screening test. The aviation ministry said on Sunday that both pilots had undergone standard psychoactive substance screening after the flight landed in New Delhi. Advertisement AdvertisementAdvertisement AdvertisementAn Airbus spokesperson said the manufacturer was providing technical assistance to Indian authorities, with a team of experts having been dispatched to Delhi. The BEA said it was involved in the investigation but did not plan to send investigators to India at this point.