Engineer gets 10-year prison term for PG&E transformer bombings

By Niina H. Farah | 12/18/2025 07:02 AM EST

Peter Karasev had admitted to using homemade explosive devices to target the electrical transformers in two separate attacks.

A sign outside the Robert F. Kennedy Department of Justice building is seen in Washington.

A sign outside the Department of Justice in Washington on May 4, 2021. Patrick Semansky/AP

A California engineer has been sentenced to 10 years in federal prison for the bombing of Pacific Gas & Electric transformers in the San Jose area.

Peter Karasev, 39, received a 120-month sentence Tuesday from Judge Beth Labson Freeman of the U.S. District Court for the Northern District of California after he pleaded guilty in April to two counts of “willful destruction of an energy facility.”

Karasev had admitted to using homemade explosive devices to bomb energy facilities on two separate occasions. An attack in December 2022 destroyed a transformer and cut power for nearly 1,500 PG&E customers for hours. Another January 2023 attack damaged a transformer and a building.

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“Karasev’s attacks on critical infrastructure were direct threats to public safety and national security,” Craig Missakian, U.S. attorney for the Northern District of California, said in a Justice Department statement announcing the sentencing.

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