ANOTHER TERROR ATTACK IN LONDON

At least 20 people are injured in Tube terror attack as home-made bucket bomb sends 'fireball flying down train carriage' amid reports of 'second device' and attacker is on the run

• Scotland Yard have confirmed rush hour blast on District Line train at Parsons Green was terror attack
• Bloodied and burned commuters 'ran for their lives' after explosion on London Underground this morning
• Victims described how a 'wall of fire' flew through the carriage and crude bucket bomb was seen flaming 
• Passengers were left with severe burns to their legs and faces - others were hurt by crush as people fled