A shop worker was taken to hospital with stab wounds following a knife-point robbery in Crawley.
Police are appealing for witnesses after receiving a call from a newsagent on Southgate Parade shortly before 3pm on Tuesday (May 13).
A spokesman for Sussex Police said a man entered the shop, threatened the shop worker with a knife and demanded money.
A quantity of money was handed over.
One shop workers received stab wounds to his hand and bottom as he tried to get the man out of the shop.
He was taken to East Surrey Hospital to be treated for his injuries which are not believed to be life threatening.
Detective Sergeant Dan Gower said: “This was an extremely nasty attack and we are appealing to anyone who might have been at the parade of shops at the time and might have seen what happened.
“The suspect is described as being around 30-years-old, about 5’, having brown hair and tanned with a scarf over his face.
“We believe the suspect left with his hood up in the direction of Collier Row.
“We have officers searching the area and we are appealing to anyone who saw anything in the area or has any information which could help with our investigation to please get in touch.
“Please call 101 quoting serial 816 of 13/5.”