Carroll High School and Carroll Senior High School will be closed Wednesday in response to a threat.
According to Carroll ISD officials, the school district received an anonymous report of a "potential threat" on Tuesday night.
Southlake police said the report involved a message that was written on a bathroom stall door by someone referring to the STARR test and a potential school shooting on May 1.
No specific target was identified and no additional details were provided in the message, police said.
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Both CHS and CSHS will be closed on May 1 while the Southlake police carry out their investigation.
All other Carroll ISD campuses will be open Wednesday and will continue with their normal operations, district officials said.
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