At least 13 schools in Houston ISD received suspicious envelopes on Friday with a white powdery substance that initial inspectors have determined is cornstarch.
The Houston Independent School District has sent the substance to the city health department for follow-up testing to make sure it is the basic cooking material and is not, in fact, hazardous, HISD spokeswoman Sarah Greer Osborne said.
The schools that got the envelopes were Almeda, Alcott, Anderson, Ashford, Barrick, Bastian, Blackshear, Briarmeadow and Browning elementaries. Attucks, Black and Fonville middle schools and Bellaire High School also received the envelopes.
“Some of them were opened when the kids were in school, but it wasn’t done when any kids were present,” Greer Osborne said.
