The arrests are part of an investigation into threats made between March 15 and 18, 2026.
A 44-year-old woman, a 47-year-old man, and a 12-year-old boy, all from Birmingham, have been arrested on suspicion of Bomb Hoax contrary to Criminal Law Act 1977.
They remain in police custody.
Assistant chief constable Thomas Williams said:
“We understand the considerable concern this incident has caused parents and the community.
“We take these reports extremely seriously and investigations are ongoing. I would also like to reassure families that there remains no evidence of any persons attending any of the schools involved posing a threat.
We continue working closely with our partners and thank the schools, parents and the wider community for their support and understanding.”
