A passenger at on a train at Parsons Green station has described the "horror" scene after hearing an explosion in the carriage right next to him.

Merton Council Councillor Daniel Holden was on the train that exploded this morning said there are "quite a few people injured."

"I was one carriage away when it happened," he said.

"It was like a fireball had just hit, everyone was screaming and panicking. Everyone was trying to push their way off the train."

"There's hundreds of police, fire brigade and ambulance here now."

Mr Holden said he wasn't injured in the explosion, but saw a few people who were.

"They're treating a few people who look quite injured," he said.

"I'm still not sure what happened."

He said the road around the station has been cordoned off.

More updates to come.