Anxiety is growing for a Buckinghamshire man who vanished in an Oxfordshire town, according to officers.

Thames Valley Police have released recent photographs of Isaac (surname withheld) following his disappearance around 10.30am on Monday April 13.

The latest images were captured five days prior in Bicester, where the 30-year-old was last seen at 2.25pm.

Described as a white man of slender build, standing roughly 5ft 10ins tall, with a bald head and body art depicting a poem and ribcage on his arm.

When he went missing, he was dressed in a black hooded top, black slim-fit trousers and carrying a backpack.

A force representative said they were circulating updated photographs of Isaac, who disappeared from Aylesbury, taken in Bicester on Monday April 13.

The representative added that the 30-year-old, originally from Broughton, was last seen in Bicester at 2.25pm on Monday.

Isaac is white, stands 5ft 10ins tall, has a thin build, shaven head and has tattoos of a poem and ribcage on his arm.

He was last observed wearing a black hoodie, black skinny jeans and carrying a rucksack.

Isaac is known to frequent Aylesbury town centre and Waddesdon, and officers believe he could now be in the Bicester area.

Officers have expressed significant concerns for Isaac’s wellbeing.

Anyone who sees Isaac should call 999. Anyone with any additional information about where he might be should get in touch via 101, quoting investigation reference number 43260178688.

Police guidance makes clear that a missing person will not encounter any difficulties when found, and alerting officers to a missing person does not waste their time. The 24-hour waiting period before contacting police does not apply.