India, Nov. 3 -- A technical glitch may have led to the collision between two helicopters as they were about to land at a high-altitude Himalayan helipad at Pheriche in Nepal's Solukhumbu on Tuesday, a Nepalese official said, ruling out weather as a cause.

A tourist from Chennai, Vasanth Kumar Balaramaramadu, 47, died on the spot, and three others were injured in the collision.

"The weather was clear at that time. While details of how the crash took place will be known after investigation, it appears there was some technical glitch," Solukhumbu's chief development officer Kaman Singh Thapa Magar told HT.

He added that a Fishtail Air helicopter carrying two passengers from Gorakhshep (about 5164 m above sea level, near Everest Base Camp...