A charity challenge sweeping Hollywood and much of the world to draw attention to Lou Gehrig’s Disease is being used to highlight the conditions in Gaza.

As part of the challenge, people film themselves being doused with a bucket of ice cold water, and then post the footage to social media including a message nominating several friends to do the same within 24 hours. They can either accept the challenge or donate to a Lou Gehrig's (also known as ALS or motor neurone disease) charity of their choice by way of forfeit.

Facebook's Mark Zuckerburg, Bill Gates, Jennifer Lopez, Oprah Winfrey and The Rock are among a slew of celebrities who have taken part in the challenge.