An 18-year-old man has been arrested in Co Antrim after an ambulance crew was allegedly threatened with a meat cleaver.
He was detained in Ravelston Way area of Newtownabbey area on suspicion of common assault and possession of an offensive weapon.
The Ambulance Service of Northern Ireland claimed two members of staff had to withdraw from the scene for their own safety.
It has called for the judiciary to take a tougher stance against violent offenders.
A spokesman said: "Attacks on crews continue despite constant appeals for them to cease.
"Crews need to feel that their own safety will not be jeopardised when attending any call-out.
"The support of those with influence on the community is required to ensure the safety of our personnel and Northern Ireland Ambulance Service would ask that sentencing in the courts should reflect the serious nature of these attacks."