An assistant principal at a North Carolina high school accused of sex acts with a student in the 1990s has been found dead, police said Friday.

David Eugene Bostian, 59, was found dead by Wilmington police at his Tipton Court home about 9 a.m. — just hours after he was arrested and released on bond, a police spokeswoman confirmed to The Post.

Detectives were investigating the circumstances surrounding Bostian’s death, spokeswoman Jessica Williams said.

“The cause of death is still under investigation at this time,” Williams wrote in an email.

Bostian, an assistant principal at Noble Middle School, was charged Thursday with two counts of a sexual offense by a government employee after a former student at New Hanover High School said they had a sexual relationship spanning two years in the early 1990s, Lt. Jerry Brewer said.

The pair allegedly did not have sex, but the “abuse was ongoing for over two years,” Brewer told The Post.

The student — who called a school resource officer to report the allegations Thursday — is believed to have been 15 and 16 at the time, Brewer said.

Bostian was taken into custody early Friday after meeting with investigators looking into the allegations. Brewer said he was given a $150,000 unsecured bond and was released.

A spokesperson for New Hanover County Schools told WECT that Bostian resigned his position at Noble Middle School early Friday. He had been employed by New Hanover County Schools since 1985, the station reported.