Updated with comments from Jenkintown Police Chief Albert DiValentino.

The athletics director for the Jenkintown School District has been arrested on charges related to an alleged sexual relationship he had with a student in 2010, the Montgomery County District Attorney's office and Jenkintown Police Chief Albert DiValentino said in a statement sent to the media.

Mark Citron was charged with corruption of minors, endangering the welfare of a child, and criminal use of a communications facility.

According to authorities, Citron had an "inappropriate sexual relationship" with the victim, then 17 years old, for about six months in 2010. 

Citron allegedly had sexual contact with the victim, now 19, in his office. The contact allegedly included at least one act of sexual intercourse.

Jenkintown Police Chief Albert DiValentino said today that the Jenkintown Police Department was notified about the allegations in early February of this year; he said the department was tipped off via the Department of Public Welfare's ChildLine hotline, and an investigation began.

“At that point we notified the victim,” DiValentino said. “She was scared and apprehensive — reluctant to do anything at the time. We assured her that she had the full support of the police department and the county.

“She said she had to ‘think on it’ for a while,” DiValentino continued. “And a couple weeks later she came in and gave a statement.”

According to an unsigned letter to parents and guardians of Jenkintown students on the school district's website, the alleged contact happened between January and June of 2010. The letter says that Citron has been suspended without pay.

"As previously reported by the District, Mr. Citron has been on a leave of absence during the initial investigation of these allegations. To date, Mr. Citron has denied any allegations of wrongdoing," the letter continues.

See the letter here.

Authorities said that Citron's phone records indicated that he was in regular contact with the victim during that time, including about 900 text messages. Authorities also said that investigators spoke "with other students who were aware of ongoing contact" between Citron and the student at that time.

The relationship came to the attention of authorities through an anonymous call to the Department of Public Welfare's ChildLine hotline.

Citron is scheduled to have a preliminary hearing before Magisterial District Judge Elizabeth McHugh on March 8 at 9 a.m. He is being held on $250,000 unsecured bail.