SPRINGFIELD, Ill. — The Illinois Attorney General’s Office is looking into the abrupt shutdown of the Korean War Veterans Museum & Library in Springfield.

The museum is locked, and major exhibits appear to have been removed, The State Journal-Register reported . The only notices of the museum’s closing were posted on its doors and on a Facebook page that has been removed.

Attorney general spokeswoman Annie Thompson said the office plans to reach out to the museum to discuss the shutdown. She said the museum didn’t file a not-for-profit disclosure report in 2016 and that it has lost its nonprofit registration.

“We also want to find out what happened to the exhibits,” Thompson said.

Federal tax records show the museum turned a profit for one year between 2010 and 2015. During that time, it reported more than $7.6 million in revenue and more than $586,000 in losses.

Charity Navigator, a New Jersey-based nonprofit that evaluates charities, gave the museum a zero on a four-star rating system in June.

“We look at finances, accountability and transparency,” said Katelynn Rusnock, advisory system manager for the company. “A zero star rating is the lowest you can get.”

Rusnock said Charity Navigator had planned to follow up on the shutdown as a precaution to donors.

Springfield Convention and Visitors Bureau Executive Director Gina Gemberling said the museum included tourism promotions and participated in bureau-sponsored events.

Information from: The State Journal-Register, http://www.sj-r.com