More than 100 buses have been tagged with graffiti in the Busways depot in Glendenning overnight.
Shortly after 7am today, Sunday, September 9, staff opened the depot in Glendenning and found more than 100 buses had been vandalised.
Two of the buses had one of their entire sides covered with graffiti.
Following information received, police attended a home in Glendenning and arrested a 16-year-old male.
He was taken to Mount Druitt police station where he is assisting police with their inquiries.
Anyone who may have information about the incident can contact Crime Stoppers, 1800 333 000.