Image source, Reuters

During his press conference ahead of Chelsea's match against Arsenal on Sunday, Blues boss Antonio Conte said the club's "thoughts are for the people affected in the incident on the Tube".

He said it was "very difficult to understand why" people had targeted the Tube station, which is near to the club's Stamford Bridge home, but added that "I think we have to continue to show that we are stronger than them."

BBC Radio 5 live

Steven Farrow who was on the Tube train at Parsons Green said after seeing people panicking, he initially thought someone had a knife.

He told BBC Radio 5 live he then moved to the front of the train to try to get away from the commotion, describing it as "the scariest moment of my life".

However, Mr Farrow said even at that moment "people were comforting each other" which was "amazing to see".

Image source, Reuters

Twenty-nine patients have been treated in hospitals in London following this morning's explosion, NHS England has said.

Eight people have been discharged from Guy’s and St Thomas’ but 21 continue to recieve treatment at Imperial, Chelsea and Westminster and St George’s.

London Ambulance crews took 19 people to hospital while the rest self-presented.

Frank Gardner
BBC Security Correspondent

Alongside the forensic investigation, a manhunt is under way to find the perpetrator.

Hundreds of detectives are trawling through CCTV images taken before and after the incident.

They are being supported by intelligence officers from the Security Service, MI5, and GCHQ, the government listening station.

MI5 is currently tracking more than 3,000 terrorist sympathisers in 500 separate investigations.

US President Donald Trump has spoken to Prime Minister Theresa May to convey his sympathies for those injured in the terrorist attack, the White House has said.

President Trump pledged to continue close collaboration with the UK to stop attacks and combat extremism, the statement added.

A Downing Street spokesperson said: "President Trump called the prime minister earlier today to offer his condolences over this morning's cowardly attack in London."

Earlier, President Trump tweeted that the person responsible for the device was in the "sights of Scotland Yard".

A Scotland Yard spokesman called the comments "unhelpful and pure speculation".

Chelsea FC - who play near Parsons Green - have released a statement ahead of their match against Sunday on Arsenal:

Dal Babu, a former chief supt with the Met Police, told the BBC those who planned attacks like these were very sophisticated online but seemed to be very unsophisticated when it came to actually carrying them out.

"We have encryption used by individuals - on What's App, Facebook or whatever device they use - to ensure that they are able to radicalise individuals and actually carry out conversations, so at the very, very highest level encryption which can't be broken.

"At the other end you have this crudeness - in terms of a bucket with what appears to be chemicals in there with a crude... timer device," he said.

BBC Radio 5 live

A couple — who do not want to be named — were forced to move their wedding ceremony from a church close to Parsons Green Underground station after a police cordon was placed around it.

The Rev Will Levanway, the curate at All Saints church in Fulham, went to the Parsons Green area to offer to help when he heard about the blast.

He offered the Rev Tim Stilwell, the vicar of St Dionis, use of his church, which is ten minutes’ walk away.

Mr Stilwell said the couple had been “cool, calm and collected” about the move.

Mr Levanway told BBC Radio 5Live: "We realised the wedding was definitely not happening today. We thought, why not pitch in and help out. We worked out all the legalities together."

Mr Stilwell said: "This was England at its best and the Church of England at its best. Everyone rallied round and we’ve had a wonderful day.”

The former Big Brother contestant apologises after posting a tweet about the Parsons Green explosion.

Frank Gardner
BBC Security Correspondent

Investigation analysts from GCHQ, the government's listening station at Cheltenham, are supporting MI5, the lead intelligence agency, in investigating today's Parson's Green blast.

BBC Radio 5 live

A woman who was on the Tube carriage in which an explosive device went off, says she thought her life was over.

A Guardian journalist writes...

Early on Friday a knife-wielding man shouting "Allahu Akbar" tried to stab a soldier on an anti-terror patrol in central Paris.

French Prime Minister Edouard Philippe, on a visit to Germany, extended his "thoughts to those injured in the London attack this morning, and also to the soldier targeted in the Paris metro.

"These two events highlight the very serious threat that we collectively face - whether in France, in England, or in Germany."

Image source, PA

• Emergency services including police, fire and ambulance were called at about 08:20 BST after reports of an explosion on a London-bound District Line train at Parsons Green
• Police say the explosion was caused by an "improvised explosive device" and is being treated as terrorism
• A total of 22 people were treated in hospital - police say "most" had "flash burns"
• Witnesses described seeing a white "builder's bucket" in a supermarket bag which was on fire and a "wall of flame" in the train carriage
• A hunt for the person who placed the device - which the BBC understands had a timer - is under way
• Some people who were in the station said they saw "panicked scenes" with people being crushed by others as they tried to escape

• After chairing a meeting of Cobra, Prime Minister Theresa May said the threat of terrorism remains "severe"
• Mrs May condemned the "cowardly" attack and said the device "intended to cause significant harm"
• A 50m cordon remains in place around Parsons Green Tube station and the District Line still has no service from Earl's Court to Wimbledon
• An increased number of police officers are at London's Tube and train stations ahead of Friday evening's rush hour

Frank Gardner
BBC Security Correspondent

Image source, PA

Within hours of this morning's blast at Parsons Green station, forensic scientists from the government's Defence Science and Technology Laboratories began examining the remains of the device.

The intact builder's bucket recovered from the site has provided them with a wealth of clues.

Early indications are that had the device functioned properly it could have killed or maimed nearly everyone around it in the carriage.

Instead, experts say that the improvised device combusted or, to use the technical term, "deflagrated".

This means that a large flame and heat were generated, rather than a full-force explosion.

A manhunt is now underway to find who planted the device.