Officers investigating a series of “revolting” antisemitic attacks on Jewish premises have issued an appeal for support from the public.
Four synagogues and a private residence in Golders Green had a substance smeared on them, while liquid was thrown towards a school and a car on two other occasions, police say.
Seven Jewish premises in total have been targeted in separate incidents in Barnet in north London in recent weeks.
Following enquiries, police said they believe the same suspect is likely responsible for all seven offences which are being investigated as religiously-motivated criminal damage.
No arrests have yet been made.
Detective Superintendent Katie Harber from the North West Command, said: “These are revolting and appalling acts and we are urging the public to help us identify the perpetrator.
“Police and local partners continue to carry out extensive CCTV enquiries which have established the same suspect is likely responsible for all seven offences. Detectives and neighbourhood officers are working at pace to identify them.
“We are very aware of how distressing these offences have been for those who have been targeted. We will not tolerate this kind of behaviour.

“We are actively engaging with the local community and remain in discussion with community partners and key stakeholders to provide reassurance and support. Please speak to a local officer with any concerns you have.”
Police were first called with a report of religiously-motivated criminal damage relating to a synagogue on the morning of Wednesday September 3.
There were further reports that similar offences had taken place in the early hours of Thursday, September 4 at a private residence and on Sunday, September 7 at another synagogue.
On Monday, police received reports about an incident where a liquid was thrown at a school which is believed to have taken place in the early hours.
On Tuesday, police received a report about a substance being smeared on another synagogue on Tuesday, September 2.
And today, police received reports of a substance smeared on the doors of another synagogue, believed to have taken place overnight.
Officers have released an image and CCTV footage of a man they would like to speak to in connection with the investigation.
Anyone with information is urged to contact the Met via 101 quoting 1071/03SEP. If you wish to remain anonymous do speak to Crimestoppers on 0800 555 111.