Ambulance has tyres slashed while treating critically ill patient
A man has been arrested after an ambulance had its tyres slashed while paramedics worked to save a critically injured pedestrian.
Police had to use CS spray to subdue the man who was wielding a knife.
It happened at just before midnight last night in Greenford, west London.
The pedestrian, a man in his 20s, remains in critical condition after being taken to hospital.