As of 1 p.m. ET on Thursday, Pittsburgh general manager Ray Shero told ESPN.com's Scott Burnside he had not heard from Jaromir Jagr's agent, Petr Svoboda.
Likewise, Red Wings GM Ken Holland told Burnside he had not heard from Jagr or his agent as of early Thursday afternoon.
Sources had told the Pittsburgh Tribune-Review an agreement was in place with the Penguins as Jagr flew from the Czech Republic to the United States.
Jagr also has a one-year offers from Detroit and Montreal, according to multiple media reports.
As of late Wednesday night, Jagr's whereabouts were in question.
Svoboda told the Detroit Free Press Wednesday night that he was unsure of where Jagr was.
"I don't know if he missed a connection," Svoboda told the Free Press. "I have no clue."
Earlier Wednesday, Svoboda told the Free Press that Jagr was en route to the United States and planned to declare his intentions, but he later told MLive.com, "I don't know where he is."
Shero and the Penguins hope that Jagr accepts their offer, plays at least one season in Pittsburgh and retires with the team that drafted him fifth overall in 1990.
"We feel from the information we have and after seeing at world championships, that he's a guy who might be able to help us this coming season," Shero told the Post-Gazette on Tuesday. "We feel he's a guy who could help us this year, and retire as a Penguin."
Jagr, a Czech native, has spent the past three years playing in Russia's Kontinental Hockey League after a 17-year NHL career.
If Jagr returns to the NHL, his 1,599 career points would be the most among active players.
Jagr cannot officially sign with a team until Friday, when free agency opens.
Jagr won five scoring
titles and the 1999 Hart Trophy as league MVP with the Penguins,
before asking for a trade in summer 2001.
In the interim, the Penguins signed forward Arron Asham to a one-year contract worth $775,000.
Information from The Associated Press was used in this report.