Teams of the Aircraft Accident Investigation Bureau (AAIB) and aviation regulator DGCA will be probing the helicopter crash near Kedarnath in Uttarakhand that killed seven people on Tuesday, according to a senior official.

The operator of the ill-fated helicopter - Aryan Aviation - had come under the regulatory scanner and was fined Rs 5 lakh recently by the Directorate General of Civil Aviation (DGCA) for certain violations.

The senior DGCA official said the teams of AAIB and DGCA have already left for the site.

It is an accident as per the classification of the International Civil Aviation Organisation (ICAO), and AAIB will be probing the case, the official added.

The Directorate General of Civil Aviation (DGCA) will also be investigating the accident.

The chopper - Bell 407 (VT-RPN) - operated by Aryan Aviation burst into flames at around 11.45 am at Dev Darshini in Garud Chatti, Rudraprayag District Disaster Management Officer Nandan Singh said.

In June this year, the DGCA issued an advisory to helicopter operators flying on the Char Dham pilgrimage routes. It came against the backdrop of an incident where a helicopter bounced and turned 270 degrees while landing at a Kedarnath helipad in May.

According to the advisory, pilots have to exercise caution for the presence of any tailwinds during approaches, especially at the Kedarnath helipad.

Pilots must take adequate precautions and if the tailwinds or crosswinds are beyond the permissible limits, the approach must be abandoned and the chopper must return to the base.

Also, adequate spacing must be maintained between the helicopters that are flying into the valley towards the Kedarnath helipad, it had said.

According to the DGCA, the operators must ensure that the helicopter pilots are qualified and well-rested to undertake flight operations.