HOBOKEN — After several days of scanning the Hudson River, the search for Andrew Jarzyk has stalled, his whereabouts still a mystery.

Hoboken police Detective Sgt. Falco said that efforts to find the 27-year-old, who's been missing for five days, are now "at a standstill." Earlier this week, divers scoured the Hudson River near Pier A Park, and authorities searched the city, but no more is known about where Jarzyk went after going for a run early Sunday.

"We've taken all the information that we have. We searched all over. Until we get any new information to send this in a new direction, we'll pursue that," he said.

The detective said that no divers were out Thursday or Friday. While authorities have no reason to believe that foul play is part of his disappearance, "anything's possible," Falco told NJ.com. Any theories on Jarzyk's current whereabouts or condition, at this point, would be speculation, he added.

"I have no idea where he is at this point," he said.

Relatives told NBC New York that they are offering a $10,000 reward for information leading to Jarzyk's whereabouts.

Jarzyk was last seen by his friends at the West Five Supper Club at 505 Monroe Street at about 1 a.m. on Sunday. He told his friends that he'd return, but he never did. About an hour later, neighbors saw Jarzyk outside his home, dressed in exercise gear. A video camera near Fourth and River streets later captured Jarzyk running south. Another camera near Pier A Park also captured him jogging past, but police are unsure what happened after he disappeared out of the camera's range.

Though the search has largely focused on the Hudson River, it's unclear how he may have ended up in the river. The waterfront in the area where Jarzyk was seen running is lined with fences that are roughly 3 feet six inches high.

Family and friends have been handing out missing persons flyers at the pier and throughout the city, in hopes of reaching someone with pertinent information. Jarzyk's girlfriend tweeted on Thursday that a group is gathering at Pier A Park at 10 a.m. on Saturday to search.