On Sunday, Scotland Yard said that a 21-year-old man had been arrested in Hounslow, south-west London, shortly before midnight.
"He was arrested on the suspicion of being concerned in the commission, preparation or instigation of acts of terrorism", Deputy Assistant Police Commissioner Neil Basu said at a Saturday news conference.
Police added that they were "keeping an open mind" about whether there may have been additional potential suspects linked to the attack.
A second man has been arrested by detectives investigating the terrorist attack at Parsons Green station on Friday.
Residents of the neighborhood say the house that was searched is occupied by an elderly couple - Penelope and Ronald Jones - who have taken care of foster children for decades.
London police said their investigation into Friday's attack is being supported by MI-5, Britain's domestic intelligence agency.
In an initial statement several hours after the blast posted by its propaganda arm Amaq, IS said a "detachment" of its group planted the bomb.
Thirty people were injured when an improvised explosive device caused a fireball on a District Line carriage.
Assistant Commissioner Mark Rowley, National Lead for Counter Terrorism Policing provided an update on the Parsons Green Investigation and the threat level to the United Kingdom from global terrorism being reduced from critical to severe, he said:"The high pace and rapid progress of this investigation is continuing".
"This will free up extra armed police to patrol the streets and protect the public."
The global agreement is facing a serious threat of collapse as tensions mounted between Washington and Tehran recently. Rouhani made the remarks at Mehrabad airport before departing for NY to attend the annual UN General Assembly meeting.
Pictures and video from the scene show police and fire engines surrounding the plane as it sits on the runway at the airport. This is a breaking news story and will be updated regularly as new information and developments become available .
She stated, "I believe we offered sufficient evidence that proved beyond a reasonable doubt that Jason Stockley meant to kill Mr. Louis Circuit Judge Timothy Wilson found 36-year-old Jason Stockley not guilty of first-degree murder and armed criminal action.
Liverpool's defensive failings were again exposed with this incident, but up front they just couldn't get the ball over the line. The lessons the home side are learning in their second full season under Klopp are more hard to ascertain.
Tottenham pay the penalty: The need for Video Assistant Referee (VAR) in the Premier League has never been greater. Do you think Llorente made the right decision? "We certainly had to graft for a point", Clement told BT Sport.
With this new security layer, data processed in the cloud is directly controlled by the customer and the customer only. The other TEE option is the hardware-based Intel Software Guard Extensions ( SGX ) solution, which leverages the CPU.
Ending DACA will set in motion rolling mass deportations over the course of more than two years. "Don't believe the spin. And so they've essentially been living as Americans in every way except having citizenship.
It's hard to know how Miami will respond to missing their first scheduled contest and spending an unscheduled week in California. Chargers - WR Mike Williams (back), CB Jason Verrett (knee) and S Reyshawn Jenkins (concussion) have all been ruled out.
Last year Francia paid tribute to Selena on her birthday, revealing she had been there for her through thick and thin. Selena Gomez definitely surprised everyone when she revealed she had previously undergone kidney transplant surgery .
Both cities are very enthusiastic about the Games and are promoting the Olympic spirit in a fantastic way'. They followed that up with the Games of the 23rd Olympiad, in 1984.
Trump hits back at Clinton, with a golf ball, on Twitter
But the move comes as the Democrat has been back in the news promoting her memoir about her loss, " What Happened ". The footage is edited to make it appear as though Clinton is hit in the back with a golf ball before her fall.
Ko in hunt for major crown in France
Former No 1 Lydia Ko of New Zealand, the 2015 Evian victor , and Ayako Uehara of Japan each picked up three shots to be 6 under. Not saying to anybody else but to me that, hey, you're playing good stuff, and you just have to be patient and be positive.
Wishes galore on Twitter for PM Narendra Modi
Cabinet colleagues, political adversaries, envoys and his admirers among the masses wished him on his 67th birthday . After this, Modi will go to the closing ceremony of Narmada festival and address the gathering in Dabhoi.