Dr. Ronald Gilbert was shot and killed in his Orange County medical office Monday.

Police were called to scene where they arrested “an elderly man” who was found in an examination room with the doctor whom he had allegedly killed.

According to authorities, police responded on Monday afternoon to several 911 calls in which witnesses reported six or seven gun shots at the medical office near Hoag Hospital in Orange County, Newport Beach police spokeswoman Kathy Lowe told The Los Angeles Times. After arriving on the scene, officers reportedly found one man dead from gunshot wounds in a patient examination room, Lowe said.

Witnesses told several media outlets that the doctor was a urologist. Further investigating cited by the AP revealed that the floor of the shooting included the offices for Orange Coast Urology, which lists three doctors on its staff.

Becky Calderwood, who works two doors down from the office where the shooting took place, told the Los Angeles Times the gunman was a patient.

"I sit right at the front desk, I would have caught the first bullet," Calderwood told the Times.

Police believe that the shooter specifically targeted Dr. Gilbert, given that he passed through a major portion of the building and waited until he was in an office to fire the shots.

"It does appear to be an isolated incident," Deputy Chief David McGill told the Los Angeles Times.

A Jewish Press report indicates that Dr. Gilbert was supposed to perform surgery on the patient.

The suspect is reportedly still in custody as officials attempt to investigate a motive for the shooting.

Gilbert was a member of the orthodox Jewish community in Newport Beach, and the community has been rattled by his death.

"He was one of the most caring, giving, generous people I knew," childhood friend, Gerry Crews, told the Jewish Press. "I doubt you would find anyone who would say anything bad about him."

Dr. Gilbert is survived by his wife and two children.

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