Bath School Disaster
Bath Consolidated School after bombing
Location	Bath Township, Michigan, United States
Target(s)	Bath Consolidated School
Date	May 18, 1927
Attack type	Shooting/explosives/fire/suicide bombing
Fatalities	45
Perpetrator(s)	Andrew Kehoe
Motive	Financial Hardship

The Bath School disaster is the name given to three bombings in Bath Township, Michigan, USA, on May 18, 1927, which killed 45 people and injured 58. Most of the victims were children in second to sixth grades attending the Bath Consolidated School. Their deaths constitute the deadliest act of mass murder in a school in U.S. history. The perpetrator was school board member Andrew Kehoe, who was upset by a property tax that had been levied to fund the construction of the school building. He blamed the additional tax for financial hardships which led to foreclosure proceedings against his farm. These events apparently provoked Kehoe to plan his attack.

On the morning of May 18, Kehoe first killed his wife and then set his farm buildings on fire. As fire fighters arrived at the farm, an explosion devastated the north wing of the school building, killing many of the people inside. Kehoe used a detonator to ignite dynamite and hundreds of pounds of pyrotol which he had secretly planted inside the school over the course of many months. As rescuers started gathering at the school, Kehoe drove up, stopped, and detonated a bomb inside his shrapnel-filled vehicle, killing himself and the school superintendent, and killing and injuring several others. During the rescue efforts, searchers discovered an additional 500 pounds (230 kg) of unexploded dynamite and pyrotol planted throughout the basement of the school’s south wing.