For more than a decade, Dr. Earl B. Bradley was a trusted fixture of the small coastal town of Lewes, Del., seeing thousands of children at a private practice he called BayBees Pediatrics.

On Wednesday, an official from the state attorney general’s office said that Dr. Bradley might have raped or molested as many as 100 children over the last 11 years, and the police scrambled to identify victims seen on videos that they say the doctor made of the assaults. They also began contacting law enforcement agencies in Florida, New Jersey and Pennsylvania, where they believe the doctor may have also seen patients.

Last week, Dr. Bradley, 56, was charged with molesting or raping at least seven patients, including some infants. A court hearing in the case was canceled Wednesday because Dr. Bradley had been placed on suicide watch.

“We are acting as quickly as possible,” the attorney general, Joseph R. Biden III, said Wednesday at a news conference.