DETECTIVES are hunting a man who held a barman by the throat after he questioned what drink he wanted.
The man pulled the barman towards him by the back of his head and threatened him after he failed to hear his order.
When the barman asked someone else to serve the man, he walked behind the bar and grabbed the barman and squeezed him by the throat.
The case is one of three unprovoked assaults included in the latest batch of Caught On Camera images.
It happened at the Four in Hand pub in Holderness Road, east Hull, on February 16.
Detective Constable Justin Marrow, from the city's priority crime team, said: "This was an unpleasant and unprovoked attack on someone who was just trying to do their job.
"The barman had been unable to hear the man when he ordered a drink because of loud music. When he asked the man again, he pulled his head towards him and abused and threatened him.
"The barman then asked one of the other members of staff to serve the man, which is when he walked behind the bar and grabbed the barman by the throat.
"He only stopped when he was pulled off the barman by other members of staff."
Officers are also investigating an unprovoked assault by a woman who punched another woman six times in the head in a takeaway.
It happened at Gino's Fast Food in Anlaby Road, west Hull, on February 14.
The suspect entered the takeaway with a man, who began speaking to the victim as they are waiting.
DC Marrow said: "While he is talking to the woman, the suspect punches her for no reason.
"This was a nasty attack which was completely unprovoked but we have a really clear image of the couple so I hope someone will be able to identify them."
Video: Ref 187 & 188 - couple wanted over assault at Gino's takeaway, AnlabyDetectives are also hoping readers will be able to identify a man who punched a woman in the face at Pave in Princes Avenue, west Hull.
He was with a woman who borrowed a lighter from the victim, but refused to give it back. She became abusive towards the victim, who was then punched by the man.
It happened on December 30.
"We have already carried out a lot of enquiries into this assault, but have not been able to identify who was responsible," said DC Marrow.
"The images we have are not very clear, but this is a last resort and we hope someone will know who they are."
A man who is believed to have twice made off without paying for petrol at Tesco in Hall Road, north Hull, is also pictured, as is a man thought to have stolen camera equipment from St Mary's College, in Cranbrook Avenue, before trying to sell it at Cash Express, in Newland Avenue, west Hull.
Video: Ref 190 & 191 - men wanted over theft of camera equipment from St Mary's CollegeDC Marrow said: "I want Mail readers to take a look at these pictures and get in touch with us if they can identify any of the suspects.
"We have had some real success through people getting in touch after seeing Caught On Camera.
"Without the public helping us to identify these people, these crimes could remain undetected and unsolved."
Do you recognise any of the people pictured here? If so, e-mail ddivpriority crimeteam@humberside.pnn.police.uk or call 01482 340605, quoting the image reference or crime number. Crimestoppers can also be reached anonymously by calling 0800 555111.
Video: Ref 186 - Man wanted for stealing a wallet