A young boy allegedly thrown from the 10th floor of the Tate Modern is now in a critical but stable condition, says Police .
The six-year-old's mum could be heard screaming "he's my son", after the youngster was believed to have been thrown from the viewing gallery before landing on the fifth floor roof at the London landmark yesterday afternoon.
Cops have confirmed the boy is now in a critical but stable condition in hospital.
A 17-year-old boy remains in custody after being arrested on suspicion of attempted murder, reports the Mirror .
The teen is not thought to be known to the boy, according to Scotland Yard .
A Met Police spokesperson said on Monday: "The six-year-old boy injured at the Tate Modern is now in a critical but stable condition in hospital.
"A 17-year-old male remains in police custody. Enquiries are ongoing."
An air ambulance landed near the art gallery on the south bank of the River Thames in London after the incident which happened at roughly 2.40pm on Sunday.
A witness, who had been on the fifth floor in the member's lounge, told Mirror Online: "I heard the impact and then screaming from above as a woman screamed 'He’s my son! He’s my son!'
"I went inside because the screaming was horrific, the boy didn’t make any noise but the people from the viewing platform were screaming.
"Inside, after around 10 minutes we were told to leave. They tried to shut down the Tate but one door was left unguarded so we left through that door."
Administration worker Nancy Barnfield, 47, of Rochdale, was at the 10th-floor viewing gallery with a friend and their children when her friend heard a "loud bang".
Ms Barnfield turned around and saw a woman screaming "where's my son, where's my son?"
Members of the public quickly gathered around a man who was nearby, she said.
Ms Barnfield said: "We did not notice the mum before, we noticed her after because she was hysterical by then."
She said the person who was restrained by members of the public before the police arrived "just stood there and was quite calm".
But most visitors only discovered that someone had been injured as they tried to leave.
Visitors told how they were prevented from leaving as police and paramedics attended the scene.
BBC correspondent Jonny Dymond, who was at the gallery when the child fell, said visitors were "funnelled towards the main Turbine Hall and the exits were all closed".
"There were quite a lot of families with children, and security guards told us we couldn't leave," he said.
"There was at least two fire engines, 10 police cars and an incident control unit.
"Parts of the exterior of the building were taped off."
At 2.55pm someone inside the gallery tweeted: "I’m stuck in the tate modern they won’t let anyone leave".
An air ambulance was pictured landing minutes later.
Greg Ritchie wrote on Twitter: "Nobody being allowed in or out of the Tate Modern for the last 20 minutes.
"Plenty of police and ambulances arriving, and a helicopter just landed. Not clear what’s happened".
Ben Weiner wrote shortly before 4pm: "Was locked the Tate modern this afternoon.
"Clearly a horrifying event occurred.
"Hope that the child who was hurt recovers. Atmosphere inside was tense, but calm.
"Staff and emergency services were in control at all times. Impossible to know what happened yet, but sounds awful."
Jenny Griffiths tweeted: "Currently locked in the Tate Modern, no one allowed in or out."
At 5.30pm Met Police said visitors to the gallery have been allowed to leave.
The Tate tweeted: "Police are investigating an incident at Tate Modern this afternoon.
"The gallery will remain closed for the rest of the day."
Signs referring to Sunday's incident remained at the entrances on Monday morning.
"Due to an incident earlier today, Tate Modern will be closed for the remainder of the day Sunday 4 August.
"We apologise for any inconvenience caused," the notices say.
The Tate Modern, situated in a former power station next to the River Thames, was the most popular attraction in Britain in 2018 with almost 6 million visitors, according to the Association of Leading Visitor Attractions.
