HARRIS COUNTY, Texas (KTRK) -- An Alief ISD school was placed on lockdown Friday afternoon after multiple people called 911 to report a shooter on campus, says the district.

The first call reporting a person with a gun at O'Donnell Middle School came into 911 dispatchers just before 3:30 p.m., Alief ISD wrote in a letter sent home to parents.

Multiple agencies descended on the campus including the Harris County Sheriff's Office and Houston Police Department along with paramedics.

Alief ISD says there was a "thorough investigation, both inside and outside the building," and no credible threat was found. The lockdown was lifted and students were dismissed as scheduled.

Eyewitness News asked the sheriff's office if it plans on tracing the 911 calls and whether it believes there might hav

See Full Page