Firefighters and police are at the scene of a suspected arson attack in Golders Green, north London.
The London Fire Brigade says crews are tackling the incident, with further information expected as the situation develops.
A local resident reported hearing a loud blast shortly after 01:30 GMT and said several ambulances were seen burning nearby, waking people in the neighbourhood.
Residents suggested the vehicles may have been deliberately targeted, and emergency services remain on site to assess damage and secure the area.
Golders Green is home to Hatzolah, a volunteer emergency medical service that has supported the local Jewish community since 1979.
The organisation has been contacted for comment.
Police enquiries are ongoing.
Authorities say more details will be released when available as this is a developing story.
