Police on Thursday released a description of a “person of interest” in a home invasion robbery that left an 88-year-old Belmont man hospitalized in critical condition.Investigators are trying to identify a man seen walking in the area of Hallmark Drive on Tuesday at around 3:30 p.m., when a man was attacked and robbed in his home, police said. The victim suffered serious injuries to his head and face during the assault.The person sought for questioning is described as a clean-shaven black man in his 20s, around 6 feet tall with a thin build and a short afro haircut. He was wearing sagging blue jeans and exposed blue boxer shorts, with a white tank top or shirtless, depending on varying witness accounts. Investigators continue to ask for the public’s help in locating the suspect, who is believed to have fled in victim’s gray, four-door 2004 Jaguar X-Type with California license plate 5KBV409. Anyone who sees the stolen Jaguar should call 911, and anyone with information on the robbery is asked to call the Belmont Police Department at (650) 595-7400 or the Belmont Crime tip line at (650) 598-3000.