Police were called to a Belfast school after it was reported a package was received containing white powder.
An area at the front of Lagan College in the Manse Road area has been sealed off and police had stopped anyone from entering or exiting the premises.
Police received a report that a package containing white powder had been received through the mail.
The Northern Ireland Fire and Rescue Service is also at the scene after being tasked to assist the PSNI.
Students from Lagan College are now allowed to leave the premises after the school was in lock-down for most of the day. pic.twitter.com/eh9AA7bq8k— Catherine McCurry (@CateMcCurry) March 15, 2017
A text message from the school to parents said that the PSNI were investigating an issue at the "front of the school site".
It said all students and staff are safe.
The message read: "All students and staff are safe but the PSNI have stated that no member of the public can access the site at present to go out or come in.
"We will keep you informed of the situation."
Lagan College confirmed to the Belfast Telegraph that the school day is continuing as normal and that the incident was "only at the front of the school".
Pupils have now been allowed to leave the school supervised by staff.