A Metropolitan Police spokesperson said: “Abdelali suffers from a number of medical issues, and dementia.
“He may be struggling with his communication and mobility and appear to be disoriented or confused.”
He is described as 5ft 5in tall, of slim build and balding with some grey hair and grey stubble. It is understood that he may be wearing a blue shirt.
Police say they are very concerned for Mr Abdelali’s welfare.