Suspect arrested in arson at Sen. Bernie Sanders’s Vermont office
Suspect arrested in arson at Sen. Bernie Sanders’s Vermont office

thehill.com
Suspect arrested for arson at Sen. Bernie Sanders’s Vermont office

Suspect arrested in arson at Sen. Bernie Sanders’s Vermont office
Suspect arrested for arson at Sen. Bernie Sanders’s Vermont office
First I heard it was inside
It sounds like it was inside the building but outside the office. The article mentions it is a building that was used by other organizations as well, so they'd have separate entrances within the building.
It mentions that the arsonist took a staircase down, guessing probably not the fire escape, and that sprinkler systems inside the building engaged.