-LRB- CNN -RRB- -- A Delaware pediatrician is facing numerous charges in the alleged sexual abuse of his patients , authorities said Wednesday , and there may be `` multiple victims . '' Dr. Earl Bradley , 56 , who has had a practice in Lewes , Delaware , for more than 10 years , is charged with eight counts of first-degree rape ; four counts of second-degree rape ; 14 counts of sexual exploitation of a child ; and two counts of endangering the welfare of a child , Delaware Attorney General Beau Biden told CNN . A prosecutor in Biden 's office estimated that Bradley may have had as many as 100 victims . Biden stopped short of that , saying only authorities think there may have been multiple victims , and the investigation is ongoing . As of Wednesday , seven victims had been identified , said Jason Miller , spokesman for the Delaware Department of Justice . CNN affiliate WBOC-TV reported Bradley is being held in lieu of $ 2.9 million bond . Read local coverage from CNN affiliate WBOC-TV He was scheduled for a preliminary hearing Wednesday in the Sussex County Court of Common Pleas , but his attorney requested that it be continued until January 14 , Biden said . WBOC reported that concerns about Bradley 's mental health prompted the postponement and said the doctor is under suicide watch at Sussex Correctional Institution . The charges against Bradley , and any additional charges that are filed , will be presented to a grand jury `` at some point , '' Biden told CNN . He would not give specifics of how Bradley came to authorities ' attention `` over the course of recent months . '' Police believe the abuse goes back `` for several years , '' with victims as young as 2 , he said . Additional charges were filed earlier this week after `` preliminary forensic investigation of a computer '' seized by Delaware State Police , authorities said in a release . Police said they have seized photographic and video evidence showing Bradley abusing victims , WBOC said . Court documents provide graphic details about the evidence , the station said . Bradley also has medical licenses in Pennsylvania , New Jersey and Florida . Biden said authorities in those states have been contacted . Biden urged parents or others who have concerns regarding Bradley to contact his office , where a hot line is staffed with people who can provide information including counseling referrals . `` We 're taking this incredibly seriously , '' he said . CNN 's Devon Sayers contributed to this report .