TOLEDO, Ohio (AP) — A woman accused of buying bomb-making supplies and plotting domestic terrorism attacks exchanged letters with the man convicted in the South Carolina church shooting and visited Columbine High School, federal authorities said.

Prosecutors described how Elizabeth Lecron had a fascination with perpetrators of mass killings and aspired to follow in their footsteps in court documents filed Monday, when she was charged with transporting explosives and explosive material with the purpose of harming others.

Officials with the FBI and Department of Justice said Lecron, 23, bought h...