The Roman Catholic priest accused of stalking talk show host Conan O'Brien was admitted to a hospital for evaluation Saturday after briefly going missing.

The Rev. David Ajemian was reported missing by his father at about 3:15 p.m. after he had not been seen for nearly three hours, police said in a statement. Police were told that Ajemian's "mental health may be of concern."

He returned to his parents' home in Boston at about 7 p.m. and voluntarily went to a hospital, police said.

Ajemian, 46, was arrested in New York City while trying to enter a taping of "Late Night with Conan O'Brien" despite being warned to stay away by NBC security personnel, prosecutors said Wednesday.

He is charged with aggravated stalking and harassment. A judge Friday found him fit to stand trial despite a psychological condition.

Ajemian, who allegedly began writing O'Brien in September 2006, has been placed on leave by the Boston Archdiocese. He was removed in June from his last posting at St. Patrick Parish in Stoneham after two years.

Ajemian attended Harvard University at the same time as O'Brien, but it is unclear whether the two crossed paths there.