A MAN who grabbed a kitchen knife from his mother's house and vowed vengeance against people who'd assaulted him has been described by his sister as 'an absolute psycho'.

Robert Clarke turned up at lunchtime at the property on Broadfield Avenue, Port Glasgow, with his face soaked with blood and intending to hunt down individuals who remain unknown.

Clarke, 39 — currently locked up on remand — was described as having been in a 'venomous' mood and was so out of control he even placed police in a state of fear and alarm.

Prosecutor Lindy Scaife told Greenock Sheriff Court: "The accused returned to his mother's house and at the time he had blood on his face.

"She asked him how that happened and he said he'd been attacked by persons in Port Glasgow.

"He stated that he intended to seek retribution and he picked up a kitchen knife and told his mother that he would 'do' the people responsible."

The court heard how Clarke changed clothes and left the house armed with the knife.

His 'clearly distressed' mother phoned his sister who in turn alerted police via an emergency 999 call.

Fiscal depute Ms Scaife said: "The sister told officers that the accused had a knife and was going to stab someone, and that he was an 'absolute psycho'.

"Later, the accused returned home and police were present there.

"Due to his injury he was taken to Inverclyde Royal Hospital in the company of the police.

"He was shouting and swearing, unable to listen to any reason and his conduct is described as 'venomous'."

Ms Scaife added: "The accused was displaying manic tendencies and he also threatened police.

"He was not cautioned and charged due to his presentation at the time."

Clarke, of Broadfield Avenue, pleaded guilty to behaving in a threatening or abusive manner, uplifting a knife and threatening to use it against persons whose identities are meantime unknown.

He also admitted placing his mother, police and people at the hospital in states of fear and alarm.

He committed the offences on October 26.

Sheriff Derek Hamilton deferred sentence until January 8 for a psychiatric report and further remanded Clarke in custody.