A TEENAGER is being questioned by police after threats were made against two high schools on Tuesday.

East Hills Boys High School in Panania and Sir Joseph Banks High School in Revesby had lock-outs in place after terror threats were made via email.

Police had been sent out to the schools and Police Minister Troy Grant’s office has been made aware of the situation.

The lock-outs were in place from about 10.30am and ended when school finished.

A male, 17, was questioned by police on Thursday night, with a number of electronic devices seized.

The teen has not been charged at this stage, and will undergo a psychological assessment.

A NSW Police media spokeswoman said officers had been sent to the two schools as a precaution.

“NSW Police have been made aware of threatening information,” the spokeswoman said.

“As a precaution officers from Bankstown LAC are at high schools in Revesby and East Hills conducting inquiries.

“Police will investigate the situation and police are reminding members of the public that it is an offence to post threatening or violence-inciting messages on social media sites. “

A spokeswoman for Mr Grant said the schools were in lock-out, with people allowed to leave but no-one able to enter.

The school gates at East Hills Boys High were locked, with people directed to call the school’s reception with any inquiries.

media_camera Students leaving East Hills Boys High School after threats were made via social media.

media_camera Graffiti at East Hills Boys High last year. Photo: Channel 7

Both schools referred The Express to the Education Department and would not comment.

A department spokeswoman said an assembly was held at both schools at midday to inform students about the siuation.

SYDNEY TO BE SPLIT INTO SUPER-DISTRICTS

“All staff and students are safe with each school in lock-out. The schools are working with NSW police with their investigation,” the spokeswoman said.

“Parents contacting the school are being told that their children are safe but they can collect them if they want to.”

media_camera Concerned parent Azzam Sari picked up his son and cousin from East Hills Boys High School.

Concerned parent Azzam Sari was one many parents who arrived at East Hills Boys High School and was admitted through locked gates by a member of staff.

“I just want to grab my kids and go home,’ Mr Sari said.

He had come to collect his 14-year-old son and cousin.

media_camera A parent waits to pick up her child from East Hills Boys High School.

He said his wife was at home crying and that the school had not told him anything.

Last year pro-ISIS graffiti was spray-painted on walls at East Hills Boys High.

“ISIS r coming,” the graffiti read. Another message read “ISIS beheads”.