Eight students pricked with syringe in 'prank' await blood test results

Emergency services responded to a Sydney high school after a "prank" saw eight students pricked with a syringe.

NSW Police and NSW Ambulance attend Plumpton High School. Source: AAP

Eight teenagers who were pricked with a hypodermic needle at a Sydney high school in a "prank gone wrong" are facing an anxious wait for blood test results.

NSW Police are now moving to interview the student at the centre of the incident as parents call for harsh punishment.

Ambulance and police crews were called to Plumpton High School about midday on Thursday following initial reports multiple people had been stabbed with a syringe.

Acting Inspector Shane Rolls speaks to the media alongside NSW Ambulance's Joe Ibrahim following the incident at Plumpton High School. Source: AAP

But emergency services subsequently said a student appeared to be pulling a "prank" and the eight students each received needle pricks to their thighs, limbs and hands.

The victims are all about 14-years-old.

"At this stage, we believe it was a prank gone wrong, maybe childish behaviour, but we'll be looking into if there was malicious intent involved in this incident," Acting Inspector Shane Rolls told reporters at the school.

"While this is very concerning behaviour, we want to reiterate no students were stabbed as initial inquiries first suggested."

The students were taken to a nearby medical centre and a hospital for urgent blood tests to find out if the needle was carrying infectious diseases like HIV or hepatitis.

Act Insp Rolls said police would soon talk to the perpetrator, who wasn't at the school.

The puncture wounds sustained by the children were "minimal" and the risks of infection low, NSW Ambulance Acting Inspector Joe Ibrahim said.

But there are unconfirmed reports the needle had been found by the student at a bus stop - meaning it may not be clean.

The victims are believed to be 14-years-old. Source: AAP

"The first test is a baseline blood and you do worry about that for up to three months - it's quite concerning - then you get your second blood test," Act Insp Ibrahim said.

The aunty of one student pricked said on Facebook that the student behind the "so-called prank" should be locked up.

Another told the Daily Telegraph it was "an attack".

The NSW education department says staff and students are being offered counselling and support.

"The school will be taking strong disciplinary action against this student," a spokesman said.