AUSTIN, Texas (AP) — Investigators said Monday they believe someone angry with the government set the Texas Governor's Mansion on fire this month, and they offered a $50,000 reward for information leading to his arrest.

State Fire Marshal Paul Maldonado had said last week that investigators did not believe the blaze was politically motivated, but he changed course Monday.

"It is likely that feelings of anger may have motivated his crime," Maldonado said at a news conference Monday. "He may be known to get angry and express strong opinions ... "