A part-time track coach at a Northeast Washington middle school was arrested yesterday and charged with second-degree child sexual assault, school and police officials said.

Reginald Robinson, a coach at Ronald H. Brown Middle School, was arrested about 2:20 p.m. yesterday at school system headquarters on North Capitol Street NE. Officials said that the allegations leading to Robinson's arrest were made last week and that he had not been at the school since then.

D.C. police confirmed Robinson's arrest, but little information about the alleged offense was available last night. It was unclear whether the episode involved a student from Brown and where or when the alleged assault took place.

Authorities also did not release Robinson's age or reveal how long he had worked at the school.

The school system distributed a news release in which Superintendent Paul L. Vance said that officials would not tolerate "any coach . . . teacher, staff member or administrator engaging in inappropriate behavior with students."

Robinson was a "contract" employee, meaning he worked part time and received no benefits, a school system spokesman said. School officials said his contract had been terminated.

He is scheduled to appear in D.C. Superior Court today.

The allegations marked the second time in recent years that the school in the 4800 block of Meade Street NE has dealt with the issue of child sexual abuse.

A gym teacher, Calvin S. Kinney, pleaded guilty in 1999 to two felony sex counts involving 14-year-old girls, one of them a learning disabled student who later gave birth to Kinney's child. Kinney was sentenced to 12 to 36 years in prison.