An evening bus route in Salisbury could be suspended after the driver was verbally abused and the bus was pelted with stones.
The driver of the number 52 service was threatened on Tuesday night by a group of youths in Gainsborough Close.
Two police officers boarded a later service which was pelted with stones, but failed to catch the culprits.
Bus operator, Wilts & Dorset, now says the service could be suspended if there are any further attacks.
Wiltshire Police say they going to launch an undercover operation to catch the gang.