How many people died in an avalanche whilst the shooting of the film 'Everest' was being carried out, which is about a 1996 Mount Everest disaster?

'Everest' is a 2015 biographical adventure film directed and produced by Baltasar Kormákur and written by William Nicholson and Simon Beaufoy, adapted from Beck Weathers' memoir Left for Dead: My Journey Home from Everest (2000). It stars an ensemble cast of Jason Clarke, Josh Brolin, John Hawkes, Robin Wright, Michael Kelly, Sam Worthington, Keira Knightley, Emily Watson, and Jake Gyllenhaal. It is based on the real events of the 1996 Mount Everest disaster, and focuses on the survival attempts of two expedition groups, one led by Rob Hall (Clarke) and the other by Scott Fischer (Gyllenhaal).

On 18 April 2014, while the second unit crew was shooting remaining scenes of the film at Camp II on Everest, an avalanche struck, killing 16 Sherpa guides. The Sherpas were carrying equipment and supplies to camps for climbers in advance of the start of the summer climbing season. Deadline reported there were no injuries or fatalities affecting the film crew. The production was not present where the disaster took place, but they were nearby.