**Updated** Police say reported explosion on subway in England was terrorist incident
**Updated at 10:55 a.m.**
At least 22 people have been injured in what police are saying was a terror attack at a London subway station.
The London Ambulance Service says 18 people have been taken to hospitals and health authorities say four others took themselves to hospital, but none are believed to be seriously hurt.
Some people are reported to have suffered flash burns after something in a bag erupted in fire on a subway car.
Other people were injured as people panicked and ran out of the underground.