Updated at 2:23 p.m.: McKinney police said the lock down was related to a burglary at a nearby residence Tuesday morning.
A law enforcement duty belt, which included a taser and a 9 mm handgun, was reported missing after the burglary, said Officer Sabrina Boston, a spokeswoman for McKinney police. She said she was not sure whether the burglarized home belonged to a law enforcement officer.
Wednesday morning, students found the belt near the McKinney High School campus and notified police.
The handgun was missing from the belt, prompting the lock down at the high school while police investigated, Boston said.
One person was taken into custody. Details about the arrest were not released Wednesday afternoon.
Original post at 12:19 p.m.: McKinney High School has resumed operations after a brief lock down earlier today, according to officials.
Cody Cunningham, the McKinney ISD spokesman, said the lock down was precautionary. It began around 11:20 a.m., after officials received a report of an incident near campus that could be a threat to students.
Students began speculating the cause of the lock down and some of them took to Twitter to air their suspicions, fueling concerns about the school’s safety.
But officials could not substantiate the concerns and lifted the lock down around 11:40 a.m., Cunningham said.
“By the time we started to investigate the matter, it became pretty apparent that the claims were erroneous,” Cunningham said.
School officials will send emails and automated phone calls to parents about the lock down.
Cunningham referred questions about the incident that led to the lock down to McKinney police, who could not immediately be reached for comment.
MHS was placed on lockdown while the McKinney PD investigated an issue near our campus. The school has resumed normal operations.
— McKinney High School (@MHSLions) October 29, 2014