CLOSE

Police in London declared the reported explosion on a London subway train a ‘terrorist incident.’ It’s unclear if an actual explosion injured anyone, but at least one witness says some people may have been trampled. (Sept. 15)
AP

LONDON — A homemade explosive set off a small fire on a train at a London subway station during rush hour Friday, injuring 29 people and prompting authorities to raise Britain’s terrorism threat level to “critical,” meaning another attack may be imminent.

The incident, which the Islamic State claimed was carried out by an affiliated unit, happened shortly after 8 a.m. local time when London’s Underground system is crowded with commuters and children going to school. Most of the injuries were flash burns, London’s Metropolitan Police said.  

It was Britain’s fifth terrorist attack this year.

Prime Minister Theresa May, acting on the recommendation of the Joint Terrorism Analysis Center, raised the country’s threat level from “severe” to “critical” — its highest possible level. May said military troops would augment the police presence in a “proportionate and sensible step,” the Associated Press reports.

Hundreds of investigators and intelligence officers are hunting for a suspect. 

Autoplay

Show Thumbnails

Show Captions

Social media users quickly circulated an image that appeared to show a small bag or bucket on fire inside a train at the Parsons Green station in west London. The image does not show much damage to the train, but eyewitnesses described scenes of panic and chaos as passengers fled the area. Some were injured in the stampede. 

“To the man (who) pulled me out of the pile of people on the stairs during the stampede at Parsons Green — thank you,” Katherine Manson said on Twitter.

Sophie Raworth, a BBC News presenter at the scene, said she…