Boy, 11, living alone in Gaza hospital, has 'witnessed scenes no child should see'
Zakaria is 11 and helps at one of the biggest hospitals in Gaza – al-Aqsa – under the mentorship of an experienced paramedic. As war raged across the strip, he could be found carrying wounded and traumatised victims into the emergency ward for treatment, wiping blood from his hands as he went about his duties. He says he has seen thousands of dead bodies.
He is one of three children who are the focus of a new BBC documentary, Gaza: How to Survive a Warzone. Others featured include Renad, 10, who stars in her own cookery show on social media, and Abdullah, 13, who leads the viewers on a tour of the "humanitarian zone" as he narrates the programme.
The documentary was directed from the UK by Jamie Roberts and Yousef Hammash, working with Gaza-based cameramen Amjad Al Fayoumi and Ibrahim Abu Ishaib.
Update 20 February: Since the transmission of this documentary, the BBC has become aware that the father of the film's narrator, a child called Abdullah, has worked as a deputy agriculture minister for the Hamas-run government in Gaza. We have published a statement on our Corrections and Clarifications page.
Watch Gaza: How to Survive a Warzone in the UK on BBC iPlayer, now, and on BBC Two on Monday at 21:00 GMT
