Counter-terrorism police have arrested a ninth person in connection with an arson attack on Jewish community ambulances in Golders Green.
Four ambulances belonging to Hatzola, which provides a volunteer-led service in the north London suburb, were destroyed in the blaze on March 23.
A 48-year-old man was arrested on Thursday in east London on suspicion of conspiracy to commit arson, Counter Terrorism Policing (CTP) London said.
Commander Helen Flanagan, head of CTP London, said: “The attack on the Hatzola ambulances caused considerable community concern and we have been working continuously to investigate this incident.
“Our aim is to arrest and charge all those responsible for the arson attacks and other incidents targeted at Jewish, Israeli and Iranian sites in recent weeks.
“Counter-terrorism officers are also working closely with our Metropolitan Police colleagues to provide protective security advice and support to various organisations, community venues and businesses.
“With the threat level now raised to severe, everyone can play their part to keep themselves and their communities safe. If you have concerns about someone behaving suspiciously, please report it to us. Your information could help us save lives.”
Three men and a youth have previously appeared in court accused of destroying the ambulances.
The latest arrest follows a number of attacks across London in recent months, including the Golders Green stabbing last week.
A total of 30 people have been charged as part of the CTP investigations connected to the incidents, the Metropolitan Police said.
Eight have been charged with various offences and a 17-year-old boy has pleaded guilty to arson in connection with an attack at Kenton United Synagogue in Harrow on April 18.
The most recent incident was an arson at a former synagogue in east London on Tuesday.