UPDATE: The U.K. has raised its terror threat level to "critical" in the wake of the attack. Previously, the threat level was at "severe."
JUST IN: UK raises threat level for international terrorism from "severe" to "critical" following today's attack in London - @NBCNews— WCSH 6 (@WCSH6) September 15, 2017
The Islamic State has taken credit for the explosion on Friday morning in the London subway, which injured 29 people. ISIS took credit for the attack on its news agency, Amaq., and said it was carried out by "a unit affiliated to the Islamic State."
Isis claims responsibility for the London attack, done by "a unit affiliated to the Islamic State" pic.twitter.com/7nVKV2rFzj— Hassan Hassan (@hxhassan) September 15, 2017
So-called Islamic State claims responsibility for explosion on a London Tube train that left 29 people injured https://t.co/hhpAnnWtZk— BBC Breaking News (@BBCBreaking) September 15, 2017
The explosive device failed to fully detonate, which likely spared people's lives. The explosion happened on a train at Parsons Green Station. A second device was located and defused. Thankfully, nobody suffered life-threatening injuries in the attack.
ISIS was also behind the London Bridge Attack in June, which saw eight people, plus three terrorists, killed.