Heartless yobs have damaged the blue strobe on an ambulance.
The private ambulance was discovered damaged on Firs Road, in Sale.
It is used by ambulance technician Luke Hewitt, primarily for private events, but is also used to assist the NHS.
Luke has also recently been volunteering as a responder for the NHS during the coronavirus crisis, however will not be able to until the ambulance is fixed.
He said the damage is understood not to have been caused by another vehicle striking it, as the damage has occurred to the side nearest the pavement.
The incident is believed to have happend on Tuesday morning between 2am and 11am.
Luke uploaded a picture of the damaged strobe on Facebook and wrote: "I can't even believe I'm having to write this post.
"Sometime between the hours of 2am and 11am hours my response vehicle has been damaged."
He told the M.E.N: "The vehicle is a private 4x4 ambulance vehicle but does assist with the NHS and is my main vehicle to get to and from stations at the moment as I'm keeping my personal car clean.
"I also was volunteering for the NHS via an app called Goodsam. I'm now not able to do that. I have just signed out of the volunteer responder app."
Luke is appealing for any witnesses or anyone with further information to contact police.
Greater Manchester Police have confirmed they are investigating.
A spokeswoman said: "I can confirm at 11.15am on April 14 it was reported to police as criminal damage."
Anyone with further information can contact GMP on 101 or Crimestoppers anonymously, on 0800 555 111.
