The arson attack lasted for several minutes. Shapiro and first lady Lori Shapiro, as well as other guests and staff members, were inside the residence when the fire erupted around 2 a.m. No one was injured, and Shapiro's family was safely evacuated. However, prosecutors said the residence sustained "substantial damage."

Gov. Josh Shapiro spoke to reporters Thursday after serving a catered lunch to Harrisburg firefighters in thanks for their role in responding to the blaze.