11:15 a.m. Update
Enterprise High Principal Ryan Johnson was interviewed by the Record Searchlight after the lockdown was lifted.
Johnson said all protocols and procedures were followed and the school conducted an investigation with law enforcement.
"All those leads and everything turned out to be nothing; we didn't find anything. But we are now confident that our campus is safe. We just want to take all precautions, make sure our kids were safe. We did that and it took about a little over two hours but now the lockdown is lifted, school is moving on. A lot of parents are taking their children out from school, which is fine, but we will be business as normal from here on out," Johnson said.
10:30 a.m. Update
Enterprise High School is lifting the lockdown that was called earlier this morning due to a report of a possible gun sighting on campus.
9:40 a.m. Update
The Redding Police Department provided more details about what prompted a lockdown on the campus.
Police said the school's resource officer at about 8:30 a.m. received information about a person believed to be a student on campus with a handgun.
"The (school resource officer) and school officials immediately placed the school on lockdown and requested resources from Redding Police patrol division and CHP - Northern Division Air Operations. Several officers were on campus within minutes and secured the campus," the police Facebook post said.
Lt. Danny Smetak said the student was found on campus and detained.
"No students were harmed, there were no shots fired. This incident is currently under investigation," police said on Facebook.
"There was nobody that was threatened with a firearm. We have not located a firearm that's why we are continuing to search and that's why the school is still currently in lockdown, but everything is OK so far," Smetak said.
Police are asking parents not to come to the campus.
"The school will be sending parents updates soon," police said.
9:20 a.m. UPDATE
Enterprise High School remains on lockdown as parents arrive to campus, receiving contradicting information, police say. Police are still working on securing the campus.
A text message sent to parents confirmed that the lockdown is due to a "reported gun sighting," but no gun has been found.
9 a.m. UPDATE
Police said they have detained a person and everything is under control and safe, according to scanner reports.
The Enterprise High School campus is on lockdown due to a possible gun sighting, according to scanner reports.
Police are searching the high school and so far haven't found anything.
According to scanner reports, one person reported seeing a girl with a possible handgun in PE class Wednesday morning.
At 8:55 a.m., police said classrooms were going to be evacuated to the football field.
Check back for updates.
Mike Chapman is an award-winning reporter and photographer for the Record Searchlight in Redding, Calif. His newspaper career spans Yreka and Eureka in Northern California and Bellingham, Wash. Support local journalism by subscribing today.
This article originally appeared on Redding Record Searchlight: Possible gun sighting at Enterprise High School causes campus lockdown