Metrolink services were delayed on Monday 17th April after vandals threw rocks at a tram and smashed a window.
The incident happened at around 11:40am at the Crossacres station, in Wythenshawe.
There were no reported injuries by the rock or broken glass.
Manchester Metrolink tweeted to say that there were delays on the Manchester Airport line.
The tram was taken out of service for safety reasons.