A fire that broke out Friday night at a Warren County, Pa., apartment building has been ruled “undetermined” and is not suspicious. P-J file photo

WARREN, Pa. — A fire Friday night at a Glade Township, Pa., apartment building has been ruled “undetermined” and is not suspicious.

Pennsylvania State Police Fire Marshal Jason Sider visited the scene on Monday.

Officially, the cause of the fire is “undetermined,” he said, but not suspicious.

The fire broke out in the easternmost apartment in the Holly Street building and destroyed that apartment. Sider said he did not investigate any of the other apartments.

He said the fire eventually spread through the building’s attic.

Sider said he did have further investigation to do and interviews to conduct.