Police investigating the terrorist attack at a Liverpool hospital have carried out a controlled explosion in public park, it was confirmed tonight.
No further details have been revealed, but the explosion was conducted at Sefton Park.
Police said there was 'believed to be no wider risk to the public'.
The investigation was continuing, a force added.
The controlled explosion was carried out 'as a precaution' and came as part of the ongoing investigation into the incident.
A suspected terrorist blew himself up with a homemade bomb in a taxi outside Liverpool Women's Hospital just before 11am on Remembrance Sunday.
The driver, named as David Perry, managed to escape alive and has been hailed as a hero.
Four suspects remained under arrest in custody on Monday evening.
Police have declared the explosion a terrorist attack, but said the motive was unclear. A passenger in the taxi, a man, died in the explosion.
In a statement, Greater Manchester Police said tonight: "Officers investigating the explosion at Liverpool Women's Hospital yesterday (14 November 2021) have carried out a controlled explosion as a precaution at Sefton Park in Liverpool as part of the on-going investigation.
"There is believed to be no wider risk to the public and the investigation continues."
Pictures claiming to have captured the incident showed police in a section of the park close to Croxteth Drive and what appeared to be smoke rising from the scene, reports the Echo.
One witness said they were walking near the park and saw police surrounding a field close to St Hilda's High School.
He said: "We were walking down and saw the police surrounding a field then suddenly a bang went off. It seemed too loud to be a firework."
Several others reported hearing a loud bang and seeing a large police presence in the park.
Officers have confirmed the identity of the passenger who died in the blast is now known - saying they believe he made the 'improvised device' involved.
His name has not yet been released.
Assistant Chief Constable Russ Jackson, from Counter-Terrorism Policing North West, said the man who died in the blast brought a homemade bomb with him into a taxi and asked to be taken to the hospital.
He was picked up in the Rutland Avenue area of the city and as the car reached the hospital’s passenger drop-off point, it exploded.
The reason why the device was taken to the Women's Hospital is unknown, Mr Jackson added, as is the reason for the sudden explosion, which has now been declared as a terrorist incident.
So far four men have been arrested under terrorism laws in the Kensington area of Liverpool – three aged 21, 26 and 29, who were held on Sunday, and a man aged 20, who was detained on Monday.
MI5 is assisting the police with the investigation.
In the wake of the attack, the UK terror threat level has been raised to severe, meaning an attack is highly likely.
