The Iranian-backed group Hezbollah has described its leader Hassan Nasrallah as a martyr and vowed to continue its battle against Israel. An Israeli Defence Forces spokesman said his death made the world "a safer place".

At the One Young World summit in Canada, we meet leaders and innovators from around the world including a 22-year-old MP, a woman using AI to tackle cyberbullying, and the founder of a fashion brand praised by Beyoncé.