CONCORD, N.H. (AP) — A federal prosecutor in New Hampshire says he expects to bring more charges against a former hospital technician accused of infecting 30 patients with hepatitis C.

David Kwiatkowski (kwiht-KOW'-skee) made an initial court appearance Tuesday, agreeing that there is enough evidence to keep him incarcerated while the case goes to a grand jury. Afterward, U.S. Attorney John Kacavas said more charges are likely, possibly one for each infected patient.

Kwiatkowski is accused of stealing anesthetics from the cardiac catheterization lab at Exeter Hospital, injecting himself and contaminating syringes that were later used on patients.

According to court documents, Kwiatkowski has denied stealing drugs and says he's "not a shooter."

Authorities previously have said he has worked in at least six states. Kacavas on Tuesday increased that number to eight.