UPDATE: The person walking on the campus has been found and detained. School security as well as police are on the scene talking to the man. The lock-down has been lifted and activities have returned to normal.
Jenks schools told KRMG news someone there "spotted someone suspicious" on the campus between the elemenary and intermediate campuses near 91st and Harvard.
School security is searching for the person and Tulsa police are on the way to assist. Students have been kept in place while the investigation continues.
KRMG news has a reporter on the way to the area and will bring y0u updates as things develop.