Police have arrested a man on suspicion of murdering two sisters at Fryent Country Park.

The man, 18, was arrested last night (June 30) at an address in south London on suspicion of the murders of Bibaa Henry and Nicole Smallman.

He currently remains at police custody.

The sisters, who lived in Harrow and Brent, were found dead at Fryent Country Park on June 7, and were believed to have been stabbed in the early hours of June 6.

They were celebrating Bibaa’s 46th birthday at the park at the time.

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The last image shared of the sisters before the murder (Photo: Met Police)

A crime scene remained at the park since the murders as police investigated the murder.

Detective Chief Inspector Simon Harding, who is leading the investigation at Specialist Crime, said: “This investigation into the awful death of two sisters is of course a priority for the MPS and my officers have been working around the clock to identify the person responsible.

“Given the significance of this development, we visited the family in person today to inform them of the arrest. Our thoughts remain with them at this very difficult time.

“A team of forensic officers have been a constant presence at the park over the last few weeks carrying out meticulous fingertip searches at what is a vast and complex crime scene. Whilst that work has now concluded, smaller searches in outer areas of the park will continue.

“To date officers have recovered more than 1,000 exhibits – including property belonging to both Nicole and Bibaa, collected hours of CCTV and visited hundreds of homes and businesses. And those enquiries remain ongoing.

“I would continue to appeal to the public to come forward with any information they feel may be relevant to our investigation.”

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Police have been at the scene since the murder (Photo: SWNS)

Two servicing officers were suspended after reports of them taking “non-official” and “inappropriate” photographs at the crime scene.

They were arrested on June 22 on suspicion of misconduct, but they were bailed pending further enquiries and suspended from duty.

It is believed that these photographs were selfies including the dead bodies, and they were shared through Whatsapp.

The sisters were in a group of people before the murder as they celebrated the birthday on June 5, but gradually attendees left and Nicole and Bibaa were the only ones remaining at around 12.30 am on June 6.

Both Nicole and Bibaa were reported as missing to police late on Saturday, 6 June when they did not return home; before they were discovered on Sunday.

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Flowers were left at the scene to pay respects (Photo: SWNS)

Detectives from the Specialist Crime Command (Homicide) are investigating, with the assistance of officers from the North West Command Unit.

Anyone with information regarding the incident is asked to call the incident room on 020 8721 4205, via 101 or tweet @MetCC quoting CAD 3160/7Jun.

Alternatively information can be provided online via https://mipp.police.uk/operation/01MPS19Z02-PO1.

Information can be provided with anonymity to the independent charity Crimestoppers on 0800 555 111 or via crimestoppers-uk.org.