One person is in custody in relation to the fire set to Gov. Josh Shapiro's official residence in Harrisburg, Pennsylvania, early Sunday, officials said at a news conference.

Cody Balmer is in custody and will be charged with attempted murder, terrorism, aggravated arson and aggravated assault against an enumerated person, Pennsylvania District Attorney Fran Chardo said at the news conference Sunday.

In a statement posted to social media, Shapiro wrote that his family woke up at 2 a.m. on Sunday to banging on the door from state police. He added that he and his wife, Lori, were "eternally grateful" for authorities who helped evacuate the family.

"Thank God no one was injured and the fire was extinguished," Shapiro wrote. "Every day, we stand with the law enforcement and first responders who run towards danger to protect our communities."

Photos of the fire response showed smoke billowing out from one of the residence's windows, blackening the exterior trim above the window with what appeared to be a layer of soot.

A narrow look inside the home through the window showed substantial damage to the interior. There was a piece of furniture by the window that appeared completely charred by the blaze.

The couple has four children together, Sophia, Jonah, Max and Reuben. Sophia and Jonah are legal adults while Max and Rueben are minors.

It's unclear whether either of Shapiro's adult children were home.

Shapiro offered Passover well wishes just hours before the attack on the residence. The governor, who is Jewish, shared a photo of his Seder table on social media.

"From the Shapiro family's Seder table to yours, happy Passover and Chag Pesach Sameach!" he wrote on X Saturday evening.

Beth Beene, who lives down the street from the residence, told NBC News that she heard fire trucks in the middle of the night but went back to bed. She couldn't believe it when she learned news of the arson investigation at Shapiro's home.

"I couldn't believe how extensive the damage was," Beene said. "I thought it was something that was caught, put out...But I was shocked to see windows broken out."

Shapiro and his wife are good neighbors, Beene said, noting that they always make time to chat while walking around the neighborhood. She said the incident was especially troubling given the timing of the Passover holiday.

"It chokes me up, because I, you know, have many family and friends, who are Jewish, and the fact that this happened on high religious holiday, specifically with our Jewish governor, is really scary," Beene said.

State police described the probe into the incident as a multiagency investigation and are offering a $10,000 reward for information.

"While the investigation is ongoing, the State Police is prepared to say at this time that this was an act of arson," the department said.

Shapiro is a Democrat who was elected to lead Pennsylvania in 2022 after serving as the state's attorney general for several years. He was reportedly among the leading candidates considered for a vice presidential run alongside Kamala Harris in last year's presidential race.

This is a developing story. Please check back for updates.