Russia blockades Ukraine's grain exports after reported drone attacks near Crimea. Here's how this puts pressure on global food crisis

Russian President Vladimir Putin's invasion of Ukraine left dozens of countries teetering on the edge of famine.

That was until a July ceasefire agreement seemed like it would ease the pressure felt by billions of people.

However, at the weekend, Russia cancelled the deal in a move that's been described as "blackmailing the world with hunger".