James Furlong is the first Reading attack victim to be named
Three people died and three others were injured in the park
The attack, on Saturday evening, is being treated as a 'terrorist incident'
Khairi Saadallah, a 25-year-old Libyan national, is in custody on suspicion of murder
It is believed to be an isolated incident and police are not looking for anyone else
Terror threat level has not been raised and police say people should be 'alert, not alarmed'
Police urge people not to share footage of the attack on social media
The PM condemns the "appalling incident" and vows that "lessons will be learned"
The man arrested by police on suspicion of fatally stabbing three people in a Reading park yesterday is Khairi Saadallah.
The 25-year-old Libyan national from Reading was arrested at the scene of the attack in Forbury Gardens in the centre of the town.
Image source, Getty ImagesPolice guard an entrance to Forbury Gardens
Forbury Gardens, the park at the centre of the attack on Saturday night, lies at the heart of Reading.
Cordoned off, with police on guard at the entrance, it is now the site of a huge fingertip search.
"Forbury Gardens will be known to everybody in Reading," Councillor Jason Brock told BBC News, calling it "a very special place for all of us".
"It is very beautiful, it's in the centre of town - people go there to socialise and relax.
"It's very much part of our community and it makes what happened last night all the more shocking and traumatic for us in Reading.
"I completely understand that people in Reading will be feeling very concerned and afraid," he said, adding that the council was working with police "hand in glove" to support them in their investigation.
Image source, ReutersThe park was the site of a Black Lives Matter protest last weekend, on 13 June
The attacker was carrying a "five-inch knife", one witness to the Forbury Gardens attack has said.
"I thought it was a fight or scuffle at first," Lawrence Wort said.
He said the attacker "darted" between people who were sitting in the park.
"He was moving anti-clockwise round a circle of people," Mr Wort said.
"I saw a large knife, it must have been five inches...I started shouting 'run'."
The head of counter-terrorism policing gives an update following stabbings in Reading, which have been declared a terrorist incident.
Read MoreThe prime minister said he was "appalled and sickened" by the attacks in Reading last night.
He said: "I don’t want to preempt the work of the police and their investigation into what happened in this case.
"But if there are changes that need to be made to our legal system to stop such events happening again we will not hesitate to take that action."
Prime Minister Boris Johnson said: "If there are lessons that we need to learn about how we handle such cases we will learn those lessons and we will not hesitate to take action where necessary."
Image source, Getty ImagesJason Brock, leader of Reading Council, has vowed that the town will come out of the incident "stronger".
"We will be engaging with communities around the town to understand how they are feeling and what it is that we need to do to reassure them and help them feel safe again."
"Reading is incredibly diverse and it celebrates that diversity," he told BBC News.
"We mustn't allow an act like this to divide us. We need to feel proud of our town and remain united"
Anthony Stansfeld, police and crime commissioner for the Thames Valley, said he was "deeply saddened to hear about the shocking events which took place last night".
He said: "Obviously this is an extremely upsetting event and my sincere condolences go out to the families of the victims and all those who have been affected.
“I would urge anyone with footage or information on the event to contact the police by calling 101 and quoting reference number 1159 20/6.
"I would like to thank the police officers who responded so quickly to this incident in order to protect the public."
Police remain at a block of flats off Basingstoke Road in Reading.
Armed police entered the flat on Saturday evening after the stabbings in Forbury Gardens in the town earlier.
Image source, AFP
Image source, AFPResidents and workers have reacted with shock at the news of what happened in their town.
Alice Penney, who moved to Reading from Kent a year ago, said she left Reading last night and went to a friend's house after she heard about the stabbings.
"I was absolutely mortified. I had been at the protest a few hours earlier when I heard the news. It was something I couldn't process.
"I feel like we cheated death. It's a safe place, normally. It's very confusing."
The suspect was detained by unarmed officers, the Metropolitan Police's assistant commissioner Neil Basu said.
He praised the actions of Thames Valley Police, as well as those who gave emergency first aid to the victims.
Image source, PA MediaA 25-year-old man from Reading has been arrested on suspicion of murder and remains in custody.
Mr Basu said although "motivation for attack is far from certain" it was not associated with a Black Lives Matter protest which had finished "hours" before the attack.
Daniel Sandford
Home Affairs Correspondent
There were two critical things in Neil Basu's statement:
The Home Office has posted details of a website offering "emotional and practical support" to victims of the attack on Saturday evening.
The site contains information on where to seek advice and assistance following a terrorist attack.
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Linda Serck
BBC South
Despite the attack taking place in a walled park on one side of the town centre, all major streets into Reading have been cordoned off.
This is forcing people to take a long detour around the edge of town to get to Broad Street, the main shopping street.
One of the policemen patrolling the cordon said it would only be for today, because there was blood in some of the roads.
Police have urged the public not to circulate footage of the incident on social media and "to avoid speculation".
"Out of respect for those deceased and injured, along with their loved ones, please do not circulate this footage on social media - this will be incredibly distressing," said Chief Constable John Campbell from Thames Valley Police.
“I would also ask that the public avoid speculation.
“If you have any information about this incident, please contact us on 101 quoting reference 1159 20/6.”
Image source, PA MediaSeveral ambulance crews attended the scene on Saturday evening
Assistant commissioner at Metropolitan Police, Neil Basu, said 41 witnesses had come forward following the attack.
In a statement at New Scotland Yard, he said officers were not looking for anyone else.
He described the stabbings as an "atrocity" and sent his "deepest sympathies" to the relatives of the three people who have died and those who have been injured.
Three people have died and three others have been injured in a series of stabbings in a park in Reading yesterday evening.
Here's what we also know:
Royal Berkshire Hospital in Reading has confirmed there were three casualties following the attack at Forbury Gardens.
Image source, David HowardTwo were treated at hospital.
One has been discharged, while the second remains an inpatient in observation, but their injuries are not life-threatening, a spokesman confirmed.
Flowers have been left in tribute to victims at a police cordon near the scene of the stabbings.
Image source, PA MediaOne reads: "There are no words that anyone can say to express how horrible and senseless this was.
"Our prayers are with all the victims and their families and friends.
"Reading stands united."
Another card said: "Reading weeps."
Prime Minister Boris Johnson has been briefed by security officials this morning over the attack at Forbury Gardens.