LAFAYETTE -- An Acalanes High School volleyball coach was arrested Friday on suspicion of unlawful sexual conduct with a student, police said.
Officers arrested 22-year-old Nicholas Daniel Kalustian of Martinez late Friday morning. Police did not disclose where Kalustian was arrested. He was taken to the Martinez Detention Facility where he was being held on $100,000 bail.
The arrest came after a police investigation into allegations of an inappropriate relationship between Kalustian and a female student. The relationship went on for more than a year, Lafayette police said. The girl was a student at a different high school, a source said Friday.
The school was notified of the relationship and contacted police, authorities said.
Kalustian, who coaches the girls' junior varsity volleyball team, was placed on administrative leave and told he cannot return to campus, police said. Kalustian also worked as an instructional aide at Burton Valley Elementary School and has been placed on leave there, according to a letter to parents from Lafayette schools Superintendent Fred Brill.
The website for the Diablo Valley Volleyball Club listed Kalustian as a coach with the club, but a profile page for him appeared to be taken down Friday.
The case remains under investigation, and police are asking anyone with information to call 925-283-3680.
Rick Hurd covers breaking news. Contact him at 925-945-4780 and follow