Details emerge after 24 days.

Police say they have “serious concerns” about an Auckland man who disappeared three weeks ago, as they release new details about his last contact with his wife.

Ronny Okeke, 60, a Sandringham man, was last seen on April 27 at a New World supermarket in Mt Roskill. He was reported missing five days later.

Detective Inspector Glenn Baldwin said police urgently needed to hear from anyone with information. He said investigators were keeping an “open mind about what happened.”

“It has been 24 days since Ronny was last seen and our concern only grows as each day passes,” he said in a statement.

“An investigation team has been working to try to piece together Ronny’s movements and what may have led to his disappearance.”

The “last confirmed sighting” of Okeke was on surveillance camera footage as he left Stoddard Rd New World about 4.42pm, according to police.

Mount Roskill New World (archive image).

He tried to call his wife, who lived abroad, at around 11am on the same day, but he did not answer when she tried to call him back.

“That their calls have remained unanswered since April 27 is very unusual and concerns us,” Baldwin said.

“Ronny is in regular contact with his wife, who lives abroad.”

Police urged anyone with information about the missing man to call 105.

“We continue to keep an open mind about what happened to Ronny. The investigation team’s priority is to reconstruct Ronny’s movements and locate him.

“We are urgently appealing to the public to come forward if you have any information. If you saw Ronny on April 27, or if you saw him or heard from him, it is very important that you contact us,” Baldwin said.