Huge blaze and gunfire reported at Iran prison

There are reports of a huge blaze and gunfire at Evin prison in Tehran - where hundreds of Iranian political prisoners and dozens of dual nationals are held. We'll get the latest and discuss the significance of this during a tense period in Iran. Also in the programme: Turkey's president Recep Tayyip Erdogan has confirmed that 41 miners have died following an underground explosion; and the brightest flash in the universe ever seen - but what caused it? (Photo appears to show a fire at Evin prison. Credit: Twitter)