There is a heavy police presence in Brough today after a reports of mystery blood "smeared" on lamp posts, bins, walls and handrails in the town.
Officers from Humberside Police, who have also been in nearby Elloughton, were called to the town earlier today and are currently surrounding a bus stop.
Several officers could be seen speaking to an elderly man sat on the bench at the stop in Elloughton Road.He was clutching a heavily-bandaged hand.
Some of the stains appeared last night and early this morning, with social media pages flooded with messages about the mystery.
Humberside Police issued a statement today appealing for witnesses to come forward.
A spokeswoman for the force said it is not thought that any crime has been committed but they are concerned for the welfare of an "individual".
Follow updates on this story in our blog below.
Police statement on injured man
Police have issued a statement: "Officers investigating the circumstances surrounding blood found on several lampposts on Elloughton Road, Brough yesterday evening (Sunday, June 13) are appealing for witnesses to come forward.
"It is thought that an unknown individual may have sustained an injury on Elloughton Road before walking in the direction of Main Street.
"At this stage, there are not thought to have been any crimes committed, however we are concerned for the welfare of this individual, who may require medical attention.
"We are asking for anyone who witnessed anything, or anyone who may have information about the incident to contact us by calling our non-emergency number 101 quoting log 284 of June 13."
Blood stains appeared overnight
The trail of blood can be seen at various points across Brough and Elloughton, with residents reporting it on bins, hand rails, lamp posts and gates.
One resident, commenting on a local Facebook page, said: "I noticed what looked to me like blood on Welton Low Road this morning walking the dog. Concerned me."
Another said: "Elloughton Road - smeared all over sign on golf course and planning permission notice next to postbox."
It was also reported on the hand rail of the footbridge over the A63 between Elloughton and Welton.