Friday marked one week since the disappearance of IU student Lauren Spierer. Volunteers continue to search the Bloomington area and beyond, while investigators continue to interview persons of interest and follow up on new leads.

A news conference was held Friday morning to provide an update on the search and investigation. During the news conference, Bloomington police Lt. Bill Parker made a plea to businesses located in the area where Lauren disappeared. He said police have made contact with several businesses already who have surveillance cameras but in case someone has surveillance but perhaps has not reviewed it, please contact them immediately: 812-339-4477.

Police said they are still interviewing persons of interest in the case but have no suspects.

"We don't have anyone we characterize as a suspect at this time," said Lt. Parker.

Lt. Parker also said America's Most Wanted will be running Lauren's case on Saturday night. Tips are still coming in and investigators are still asking anyone with information to call or email. You can call the Bloomington Police Department of 812-339-4477 or 1-800-CRIME-TV. You can also email your tip to policetips@bloomington.in.gov.

Fox59 News had previously learned police have searched the car of Lauren's friend, the man she was last seen with before she vanished. Officers have finally gone on record saying there was a fight in Lauren's building involving that same friend and friends of Lauren's boyfriend. Bloomington police have firmly said Lauren was not involved in the fight but would not say for certain whether she was there when her friend was punched in the face.

Lauren Spierer is described as approximately four feet, 11 inches tall with a slender build. She has blue eyes and blonde hair, longer than shoulder length. The 20-year-old had just finished her sophomore year at IU. Her mother, Charlene Spierer, said her daughter has a life-threatening heart condition called Long QT Syndrome. If anyone knows where Lauren is, they are asked to to please take her to a hospital.

Lauren's mother also spoke at Friday's news conference, asking everyone to participate in "Lunch for Lauren." Everyone is asked to search their homes or where they work during their lunch hour for Lauren.

Indiana University President Michael McRobbie released a statement, saying "The entire Indiana University community is deeply concerned over the disappearance fo Lauren Spierer. We will continue to cooperate in every way possible. IU will do all that we can to support Lauren's parents and to help find out what has happened to Lauren. We will continue to assist the family and authorities in any way that we can."

The volunteer effort to find Lauren has been impressive. Now her family is offering a $100,000 reward for information that breaks the case. Lauren's father, Robert Spierer, has also pleaded for more help by asking everyone to do what they can to find his daughter.

"We're asking you check your own properties and look through the fields, look through the woods, look in the barns, look in the sheds and look in the garages," said Spierer.

Attorney Ken Nunn is also offering a $25,000 reward for information leading to the capture and conviction of any persons responsible for her disappearance. Indianapolis Colts owner Jim Irsay also tweeted that he is offering a $10,000 reward for serious information that solves the case.

Authorities followed up on a tip searching Lake Monroe this week but have not found anything. Canine searches have come up empty as well.