London's Metropolitan Police said Kent Police arrested the man Saturday morning local time in Dover, about 75 miles southeast of London on the country's coast.
"People who are traveling in London will see an increased armed police presence on the transport network and security will be increased".
Previously in 2017, four attacks in London and Manchester claimed the lives of 35 people. "For strong investigative reasons we will not give any more details on the man we arrested at this stage".
Emergency services outside Parsons Green station in west London after Scotland Yard declared a terrorist incident.
United Kingdom officials on Friday raised the national threat level to "critical" after a bomb partially exploded aboard a train during the morning rush hour, injuring 30 and placing the country back on high alert after a series of devastating attacks earlier this year. Many have been told to stay in lockdown as police evacuated the area and placed a wide zone under a police cordon.
Friday's blast injured 29 people, but it's thought the homemade bucket bomb didn't actually detonate properly: it set off a fireball in the train carriage, but NOT the devastating explosion that was intended.
The Islamic State (IS) extremist group through its Amaq propaganda agency claimed responsibility for the attack, the fifth in Britain this year.
The UK terror threat has been raised to critical - the highest level - meaning an attack may be imminent.
He was arrested under section 41 of the Terrorism Act and taken to a south London police station where he remains in custody.
Police have arrested a second man as part of the investigation into the Parsons Green terror attack on Friday.
"The threat level has been raised to critical, therefore we are reviewing our events and current demand".
On Friday, an explosion, most likely involving an improvised explosive device, hit the tube station, causing facial burns to the passengers. In their statement on the arrest, the Met said that investigators have spoken to 45 witnesses and received over 70 images and videos from the public.
Incidentally, former Vice President Al Gore's new movie about global-warming danger, "An Inconvenient Sequel", will play at 7 p.m. Scientists have cautioned against suggesting any linear causality between climate change and particular climate events.
In July, Iraq retook control of Mosul, Islamic State's key stronghold in the north, after a campaign of almost nine months. In recent months, Islamic State has suffered a series of military setbacks and lost ground in Iraq and Syria.
The Bosnian has become an instant hit with the Emirates faithful owing to his tough defending as well as his attacking prowess. Can the same be said for Chelsea? Surely they are going to be unsafe against any team in the world.
Klopp left his subs late, too late for some, but when Dominic Solanke came on he perhaps spurned the greatest chance of a game. Obviously we have quality and now we have to use this quality consistently, that should be the plan. "I'm not happy.
For much of regulation, what was hyped as a rematch-for-the-ages between No. 4 USC and Texas didn't live up to its billing. The turning point in the second overtime came when the Trojans defense forced a fumble with Texas threatening to score.
The lawsuit was initially dismissed by a judge in 2014, but the ICP won an appeal in 2015 ordering a MI court to take up the case. However, they added that the majority of Insane Clown Posse fans are not involved in criminal activity or organized crime.
It means fans will see their favorite golfers compete again for the 2020 Tokyo Olympics as well as four years later in Paris . It is the first time the International Olympic Committee has awarded a Games 11 years in advance.
Just nine days after he had made them so happy, the champion of their anti-immigration fantasies had betrayed them. West Virginia Republican Congressman Evan Jenkins, who is vying to challenge Democratic Sen. "He likes me, anyway".
But aside from the dominant Red Bulls, Hamilton was half-a-second clear of his fourth-placed Mercedes team-mate Valtteri Bottas . At Monaco and Hungary which are both notoriously hard to overtake on Ferrari secured a 1-2 and left Mercedes lagging behind.
Oregon State picked apart by Washington State QB
Some other players also hold a good record like Victor Bolden, Jr. who has caught seven passes for 113 yards. But Falk has had success against Oregon State as the Cougars have won three straight against the Beavers.
Hamas to dissolve government for Palestinian unity
Hoping to pressure Hamas to relinquish control of Gaza, Abbas has cut payments to Israel for the electricity it supplies to Gaza. Last blow: ostracized by its arab neighbors of Qatar, main financier of islamist movement in palestine.
Airtel monsoon offer
As the popular Monsoon offer comes to an end, the largest telecom operator is making sure its users get the best benefits. After following the next instructions, customer will have to download the Airtel TV APP and install it on the phone.
Could a skin patch melt away unwanted fat?
These nanoparticles were loaded into a finger-tip sized skin patch containing dozens of microscopic needles that pierced the skin. Nanoparticles located in the needles are released into the underlying tissue and spreading the drug across the body.
Mississippi State pulls off upset of No. 12 LSU
Also, Etling, because Mississippi State's defense was the first this season to force him to move, had a awful passing night. Alabama, 3-0 after a win over Colorado State Saturday, will continue to occupy the throne until someone else grabs it.
IPhone X: How outrageous is that $999 price tag?
Frankly, we're just confused by the iPhone 8 - the regular phone - since it's basically a slightly refreshed regular sized phone. But maybe the biggest effect of such a big and compelling screen is that it makes your phone more attractive and enticing.
SC receiver Samuel out for season
Kentucky junior LB Jordan Jones (shoulder) has been ruled out for Saturday's game against SC . He had five catches for 122 yards, including a 68-yard touchdown catch to open the game.
No Sherman against 49ers? No problem
While both corners proved to be up to the challenge, each will likely be counted on to play large roles again against the 49ers. And typically the Seahawks have beaten the 49ers by getting back to basics, averaging 160 yards rushing in those four wins.