Schools in Irving, Mesquite and Dallas, a Garland day care and a Grand Prairie church reported receiving white powder letters Tuesday.
The Pierce Early Childhood School in the 900 block of Britian was the first to report an incident. Irving hazmat responded to the scene.
The second location was the Clifton Early Childhood School in the 3900 block of Pleasant Run Road.
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The third letter, which was reportedly found at about 3 p.m., was sent to the Head Start Day Care Center in the 3700 block of West Walnut in Garland. The health department responded and determined the letter was not toxic. The postal service is investigating the incident.
The Lighthouse Church in the 400 block of NE 27th Street in Grand Prairie also reported a white powder letter at about 4 p.m.. The person who opened the letter accidentally touched the powder and washed it off, Grand Prairie police said.
Grand Prairie police and firefighters responded to the church. Federal postal inspectors have been called and will take jurisdiction, Grand Prairie police said.
Dallas Fire-Rescue said that the Headstart School of Mesquite and the Headstart School of Greater Dallas also reported white powder letters Tuesday night.
Hazmat crews identified the substance in both of those incidents as a nontoxic sugar synthetic commonly found in artificial sweeteners, Dallas Fire-Rescue said.
No injuries in connection with the letters have been reported.