SALISBURY — Matthew David Belk, a recently resigned teacher and boys basketball coach at South Davidson High School in Denton, was charged Tuesday with having sex with two of his students, dating back to May 2013.

Belk, 30, of Gold Hill, faces 21 felony charges of sex offense with a student. According to a report from the Rowan County Sheriff’s Office, there were two teenage victims who were students at the high school.

“The incidents began in May 2013 and continued until the school was notified in November 2014,” a Sheriff’s Office press release said. “During the course of the investigation, Belk resigned from the Davidson County Schools.”

The alleged sexual offenses occurred at the teacher’s home, the sheriff’s department said.

Belk turned himself in to the Sheriff”s Office Tuesday and was served the felony charges. He was placed under $10,000 secured bond.

Davidson County Schools released this statement:

“Following an investigation by appropriate law enforcement, South Davidson High School teacher Matthew Belk tendered his resignation effective Nov. 24. The Davidson County school system continues to follow district policy and is cooperating with law enforcement. Student and staff safety is a top priority, and we take all reports and allegations seriously. Our concern is for any student that may be treated inappropriately.”

According to the high school’s website, Belk taught science at South Davidson. He is a graduate of East Carolina University and East Rowan High, where he played basketball and later was a junior varsity basketball coach.

He had been boys basketball coach at South Davidson since 2012.

Anyone with additional information in this case is being asked to contact Lt. Chad Moose at 704-216-8687, or Detective C.J. Gordy at 704-216-8710.