NEW YORK (CBSNewYork/AP) – Parents, family, volunteers and friends say they have scoured every inch of the downtown Bloomington, Indiana area where 20-year-old Westchester native Lauren Spierer was last seen.

They plan on expanding their search Thursday. Bloomingdale Police Lt. Bill Parker Parker said divers would return to nearby Lake Monroe after a search Wednesday turned up nothing.

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Police say the missing Indiana University student wasn’t involved in any altercations before she disappeared.

But Parker won’t discuss reports that a male friend with Spierer was in a fight with other men a couple hours earlier.

WCBS 880’s Catherine Cioffi reports: Search For Lauren Spierer Expanding Beyond Bloomington City Limits

Spierer, who is from Edgemont, disappeared early Friday. She was last seen by her friends at 4:30 a.m. after a night of drinking.

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“We will be working and doing whatever we have to do to find Lauren and bring her home,” her father Robert Spierer said Wednesday.

Bloomington police said Tuesday foul play could be involved in her disappearance.

So far there are no leads and no suspects in the disappearance.

Jim Irsay, the owner of the Indianapolis Colts, is offering a $10,000 reward for information that helps locate Spierer. Television host Ryan Seacrest Tweeted a photo of Spierer and asked fans to help locate her. Other celebrities including Elisabeth Hasselbeck and Vivica Fox also Tweeted asking for help locating her.

Robert Spierer says a $100,000 reward is also being offered for information leading to her return.

The National Center for Missing and Exploited Children is also assisting the police in the search.

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