Police are appealing for witnesses to come forward.
At around 5pm on Friday (13 August) a man was reportedly overheard in Earl Shilton before boarding the 48L bus.
The bus travelled along the A47 Hinckley Road before officers stopped the bus in Leicester Forest East.
A 49-year-old man from Sheffield was arrested on suspicion of making threats to kill and later released under investigation.
He was wearing a brown gown, black woolly hat and a dark jacket.
PC Baker said: “This was a very concerning incident for those who overheard these remarks.
“We would like to hear from anyone who saw the man described or from anyone who was travelling on the 48L bus at the time.”
Anyone with information is asked to call 101 quoting 21*455729.
Leicestershire school children on Britain's Got Talent
Work starts on multi-million pound STEM building at The Hinckley School
Footfall up as Nuneaton hosts "teen market"
Advice ahead of Resident Doctors strikes in Leicestershire
Recycling at Easter
Biggest ever fine for tree felling in Leicestershire
Seven bailed over Nuneaton protest
Appeal for witnesses following Motorbike accident
