An air ambulance was called after a man was attacked with a knife when three men broke into a home.

Hertfordshire Constabulary says it is investigating an aggravated burglary at an address in Callowland Place, off Leavesden Road, North Watford, at 7.45pm on Saturday, June 20.

The county's police force says three men forced entry into the property and attacked the victim - a man in his 50s - with a knife while demanding money.

The victim suffered two puncture wounds to his chest and abdomen, as well as a laceration to his hand, police say.

An air ambulance was called to the aid of the victim and landed in nearby Callowland Park.

But police say the victim was taken to hospital by road after his injuries were deemed non-life threatening. He has now been discharged and is recovering.

Police say the suspects stole £200 in cash and fled the scene.

They are described as two white men and one black man, all of whom were wearing face masks.

One witness said they saw police in "riot gear" at the scene and that at least four police cars attended.

Police are appealing for any information and witnesses following the incident.

Detective Constable Julie Vint, from the Watford Local Crime Unit, said: “This was an understandably alarming incident for the victim and his family, who were also inside the property at the time of the burglary.

“We carried out extensive enquiries on the evening of the incident, talking to witnesses and recording statements, and we are now looking at CCTV cameras nearby.

“I would now like to appeal to anyone who saw any suspicious activity in the Leavesden Road area at the time of the burglary. Did you see any people acting in an odd manner, or any unfamiliar vehicles in the area?

“We understand that news of this crime will be unsettling for the wider community and there was a heavy police presence in the area on the night. I would like to reassure residents that we are doing all we can to identify the perpetrators.”

Anyone with information can contact DC Vint at julie.vint@herts.pnn.police.uk or call 101 quoting crime reference number 41/48253/20.