New Delhi, June 10 -- The Directorate General of Civil Aviation (DGCA) said on Monday it had intensified safety oversight of helicopter operations in Uttarakhand and introduced live monitoring and surprise audits. The move comes in the backdrop of four helicopter-related accidents that have occurred since the Char Dham Yatra began on April 30, one of them claiming six lives. The regulator suspended the services of two operators for two hours on Monday for violating standard operating procedures (SOPs). One of them was Kestrel Aviation involved in the latest incident that happened on June 7 when a helicopter of the operator had to make an emergency landing on the Kedarnath National Highway due to a technical fault. While the pilot sustained minor injuries, passengers were unharmed. As a precaution, the DGCA also launched special audits and instructed operators to fly only under Out of Ground Effect (OGE) conditions, which are considered safer for take-off and landing in high-altitude zones. "Directives have been issued restricting operations to OGE conditions till further orders. The DGCA is also reviewing the need to curtail helicopter operations to Char Dham if required," the regulator said in a statement. To strengthen real-time oversight, the regulator has also begun monitoring live video feeds from Kedarnath, provided by the Uttarakhand Civil Aviation Development Authority, to spot violations on the ground. The aviation watchdog said that investigations are underway to determine causes behind the recent incidents. On May 8, a helicopter en route to Gangotri shrine crashed in Uttarkashi, killing five pilgrims and the pilot. A passenger survived with critical injuries. On May 12, a helicopter's blade struck a vehicle at the Badrinath helipad and on May 17, an AIIMS-Rishikesh air ambulance crash-landed near Kedarnath. No casualties were reported....