SAN JOSE, Calif. (BCN) — A San Jose man was arrested Thursday morning for allegedly possessing explosive materials at a home in the city. San Jose police said they arrested Peter Karasev, 35, in the 600 block of Potomac Court. Police are also investigating possible narcotics activity at the home.

San Jose Police Sgt. Christian Camarillo said “there is so much material in there that we’ve had to call in some federal resources to assist us,” and said the home had not been “rendered safe” as of early Thursday afternoon.

According to court filings sent out Friday from the Superior Court of California, County of Santa Clara, Karasev is being charged with nine counts related to explosives, arson, possession of materials with intent to make destructive devices, and injuring with electric lines, among other allegations.

Nearby homes have had to be evacuated during the investigation into what Camarillo called “very volatile and dangerous material.”

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SJPD said the investigation stemmed from two separate incidents involving explosive devices between December 2022 and January.

On Jan. 5 around 1:00 p.m., officers responded to reports of a damaged transformer on the 6000 block of Snell Avenue. A PG&E employee told police that an explosion occurred the night before around 2:00 a.m. and that a similar incident happened on Dec. 8, 2022, around 4:00 a.m. on the 5000 block of Thornwood Drive in which an explosion damaged to a transformer.

Bay City News contributed to this report.