Police patrols have been stepped up in a Sheffield suburb after a bus driver was robbed and another was threatened with a gun.
The men, who work for First, were parked up at the bus terminus on Raeburn Road, Herdings, when they were targeted.
In the first incident, where the driver was and assaulted and had cash taken, he was threatened with a hammer.
Two days later another driver was threatened with a gun, which he believes was an air weapon.
Bosses at First have now banned buses from stopping at the terminus after 8.45pm.
Sergeant John Mallows, of the Woodseats and Gleadless Valley Safer Neighbourhood Team, said: “There have been two incidents which we believe are isolated but we are treating them seriously.
“These incidents must have been distressing for the drivers and we are doing everything we can to find those responsible.
“We have put a plan in place to ensure there are extra police officers and community support officers in the area in the evenings to offer reassurance and prevent further incidents.
“We are working closely with the bus company and key community contacts to keep them updated on our investigation and the work we are doing in the area.”
Brandon Jones, from First, said undercover officers often travel on buses when there have been problems in a bid to identify offenders.
He is urging members of the community with information about those responsible to come forward before normal bus services can be resumed.
Anyone with information should call South Yorkshire Police on 101 or Crimestoppers, anonymously, on 0800 555111.