Santa Clara County sheriff's dive team conducting a re-scan of the Chesbro Reservoir in search of clues in the Sierra LaMar case, did not locate anything so far.
The Morgan Hill teen has been missing since March 16. The reward in the case has been recently increased to $35,000, as well.
The re-scan is not based on tips, according to authorities. The detectives in the case "requested the Dive Team to conduct a re-scan ... with the new Side-Scan Sonar equipment the team recently acquired," according to a release.
The dive will becontinue to be conducted through the rest of the week, with sonar going first and then divers to verify any areas of interest.
Lamar's social networking accounts have been hacked since her disapperance, the most recent an Instagram message claiming to have been posted by the missing teen asking for help.
According to authorities, no clues as to her whereabout have been located yet.