Update: Carson High issues 'all clear' after Friday lockdown

1:25 p.m. update:

An "all clear" has been issued at Carson High School.

The lockdown and investigation centered around a possible sighting of a weapon on campus, according to a text sent from the school district to parents.

At this time, no weapon has been found, according to officials on the scene.

No injuries have been reported from Friday's events.

1:10 p.m. update:

Carson High School is "secure," school district spokesman Dan Davis says, following a lockdown at 12:15 p.m. Friday.

The situation is being investigated by the district and the Carson Sheriff's Office.

No injuries have been reported. The district is asking that no one go to the school while the investigation continues.

Original story:

Carson High School is on lockdown as of early Friday afternoon.

Details of any potential threats to the school are not known at this time. Carson Sheriff Ken Furlong told the The Appeal that his office was “actively seeking the source of the lockdown,” but no other information was known.

This story will be updated.