A man was bitten in the face during a vicious attack in Castleford town centre.
The 25-year-old was attacked on Sagar Street at around 3am on Sunday morning following an argument.
Police said the victim tried to leave the scene of the argument but was followed by a man who assaulted him.
He was seriously injured in the attack and taken to Pinderfields Hospital in Wakefield for treatment to facial injuries which police said were caused by biting. Detectives appealed for anyone with any information or who saw anything suspicious in Castleford town centre around the time of the attack to get in touch.
People should contact DC James Eve at Wakefield CID on 101.
Alternatively contact Crimestoppers, anonymously, on 0800 555111.