Over 40 Dallas police units were present at North Dallas High School on Tuesday morning.
Police initially responded to the school in the 3100 block of North Haskell Avenue around 7:56 a.m., according to active call records.
What we know
Police began moving children away from the school and searching the building around 8 a.m., approximately an hour before school was scheduled to open, according to police dispatch calls. It was the students’ first day back after the holiday break.
Breaking News
Access to the school, which sits off of McKinney Avenue, was blocked off by police motorcycles as far out as Cityplace West Boulevard.
As of 9:20 a.m., more than a dozen uniformed officers stood outside on the school’s concrete steps, moments after a police dog was led inside.
Around 10 a.m., police began allowing students and teachers into the school, though they were using a side entrance and not a main stairwell.
School buses began to arrive at the school shortly after 10:10 a.m.
What we don’t know
Police dispatch calls showed that there might have been a potential threat toward the school, but it was not specified what the threat was.
Officers at the scene said the police communications department was working to issue a news release with more information.
Dallas ISD has not yet commented on the situation.
This is a developing story.