"We have not confirmed whose body it is", Mohamad Mat Yusop, the police chief of Negeri Sembilan, where the resort is located, told reporters.
Officials are in the process of determining whether the body is Nora's.
Announcing the reward on Monday, her mother said Nora was "so precious to us" and said, their "hearts are breaking". "However it sadly seems likely".
Investigators previously said they had not ruled out a "criminal element" in the teenager's disappearance.
Police from Ireland, France and the United Kingdom are also on site to assist in the investigation.
Missing persons charity the Lucie Blackman Trust said the body had not been identified but was "likely" to be the teenager, from London.More news: Moscow crash raises new questions about Tesla autopilot
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The statement asks that the privacy of the family and friends be respected. "At this harrowing time all of our thoughts and prayers are with the family", he said.
A statement released on Tuesday said: "Nora's family believe she has been abducted". She has been vulnerable since the day she was born.
Over 350 people as well as a helicopter, drones and sniffer dogs have been combing the area around the resort for the past ten days.
"She is here now, so we will stay here tonight to see if we can find her then we can know why she went missing", said shaman Mohd Khalid Mohamed.
According to the New Straits Times, a police forensics unit vehicle was spotted entering the cordoned-off resort at 3.30pm.
Nóra's mother Meabh is from Belfast, while her father Sebastien is French.