Philadelphia Police are investigating how a sexually explicit video of a Red Clay teacher made it onto social media last week.

Red Clay administrators learned of the video showing a Thomas McKean High School teacher masturbating after students discovered it on social media.

Parents were notified about the incident Tuesday afternoon via voice message and email.

"The district immediately contacted authorities and the teacher was placed on leave pending an investigation," said Taylor Green, spokesperson for the district. "The school has made counselors available to any student or staff person who wishes to avail themselves of these services."

It is unclear why the case is being investigated by the Philadelphia Police.

The teacher could not be reached for comment.

WESLEY COLLEGE:Recent moves show Wesley College is trying to shore up financial health

The school was first made aware of the video on Oct. 14, Green said.

Copies of the video have circulated among students, Adriane Fisher, a McKean parent, said. She didn't know about the video until Monday night, when her freshmen twins showed it to her. By then, many of their friends had seen it as well, she said.

BUS MIX UP:Drivers, districts tell the other side of the story

"This is my 14-year-old daughter walking around with this video. They didn't give us any notice," she said. "This is a conversation now that I have to have with my children. And my children aren't the only ones with this video."

Because it is a personnel matter, the district is unable to share additional information. Philadelphia Police were also unable to share information on the ongoing investigation.

Natalia Alamdari covers education for The News Journal. You can reach her at (302) 324-2312 or nalamdari@delawareonline.com.

AT UD:University of Delaware students were put in hotel housing. Then, they were asked to leave