Preliminary data based on the notification from the Indian authorities:
Pilot in command performed go-around due to loss of sight of runway because of sudden increase of intensity of rain and strong gusty winds. During the go-around aircraft contacted with runway surface. The crew was unable to retract the landing gear while go-around. Aircraft diverted to Chennai with landing gear extended. Normal landing was carried out on runway 07 at Chennai. The aircraft stopped on the runway and sought ATC assistance to tow the aircraft.