Updated: Lockdown lifted, Campus Drive Reopened

placed , the neighboring office and on a "precautionary" lockdown around midday Tuesday to investigate a letter indicating people would be killed on the high school campus. The lockdown was lifted shortly before 2:30 p.m., and Campus drive was reopened about two hours after that.

Students were released onto the high school's football field after being holed up in classrooms while police investigated the threat. Police won't say how their investigation led them to Holly Avenue, but because the school was on a minimum day schedule, the lockdown affected only a handful of students there.

Police say the at at any specific person. No arrests have been made, and Arcadia Police Sgt. Tom LeVeque said police have not finished interviewing students.

The exact contents of the letter remain unclear.

The rumor circulating amongst several students was that the letter read, "11.01.11 is a good day to die" and its writer allegedly threatened to set a bomb off on campus.

Outside the high school, helicopters could be seen overhead and streets around the campus were blocked off Tuesday afternoon. Parents were waiting outside the campus after 2 p.m. to pick up their kids and many said they had been in contact with their children via text message.

Officers directing traffic in the area said parents had remained calm and heeded warnings to stay away from the campus until the end of the school day.

Parent Tina Rodriguez said that she wasn't too worried about the lockdown but became alarmed when her daughter sent her a text message saying, "I love you."

"She doesn't usually say stuff like that," Rodriguez said. "She's OK right now; she's drawing comics."

Lina Austria said her son, who did not eat lunch before the lockdown, was fine, but hungry. 

"I told him, 'I have a burrito, can you get it by the gym?'" Austria laughed. "He said, 'I can't leave the classroom.'"

Senior Nick Lucas was in his economics class when police and school officials called the lockdown, which he called "boring."

"We just sat there and played games on our phones," he said.

Lucas' friend, junior Paige Torres, said she "didn't feel scared, just worried." Torres was in her history class during the lockdown.

The initial alert went out about 12:18 p.m. on Nixle:

Arcadia HS currently on lockdown. Arcadia Police on scene & conducting a threats investigation.

The Arcadia High School was placed on lockdown shortly before noon today. School officials became aware of threats made against the school earlier this morning, and notified the Arcadia Police Department. School and Arcadia Police officials are working together conducting an investigation on campus. Students will remain on lockdown until further notice.

Patch will update this post as we get more information.