Invercargill police are trying to identify two people who visited Queens Park last month who might have seen missing man Raymond Horn that day.

Senior Constable David Loader said police would like to speak to two people who were in Queens Park, Invercargill at about 2.20pm on Monday 15 February.

"We know Raymond was in this area on that Monday," he said.

"We're hoping they might have seen Raymond and can help us continue to build a timeline of his movements."

Anyone with information that can help identify the two people in this photo are asked to contact Police on 105 and quote file number 210215/8028.