A bus driver was left shocked after three men tried to grab her cash bag.
It happened at 1830 BST on Tuesday in Marsden, South Tyneside, on the double-decker bus which had terminated and was going towards the South Shields depot.
Three men who had hidden upstairs tried to drag the 24-year-old female driver off the bus and steal her cash bag.
They were unsuccessful and ran off.
They are described as aged 19 to 20 and one was 5ft 6ins, with brown hair and a red long-sleeved top.
The attack came as transport services began a major drive to stamp out anti-social behaviour on other parts of the network.
Transport Alert aims to cut down on crime on Newcastle's buses by building up a bank of information so problems can be targeted more effectively.
Nexus is leading the scheme in partnership with bus operators Arriva Northumbria, Go North East, Stagecoach as well as Northumbria Police.
It has previously been run in North and South Tyneside, Gateshead and Sunderland.