WASHINGTON, D.C. (BNO NEWS) — At least two people were injured after a gunman opened fire at the U.S. Holocaust Museum in Washington, D.C. on Wednesday, police officials told BNO News.

The shooting happened at around 12.50 p.m. local time, a spokeswoman for the Metropolitan Police Department said. Officers initially responded to sounds of gunshots around the Holocaust Museum and found two shooting victims at entrance of the building when they arrived on scene.

During a press briefing, a spokesman for the Metropolitan Police Department said that a gunman walked into the museum and opened fire at a security guard. He was said to have carried a “long gun” but it was unclear whether he was using a rifle or a shotgun. Immediately when the gunman opened fire, one or two other security guards returned fire at the gunman.

Both the gunman as well as the security guard are believed to be in serious condition and, according to media reports, a third person was also injured from flying glass. Officials were not immediately able to confirm the reports of a third injury. The gunman and security guard have both been transferred to George Washington University Hospital.

According to CBS News, the gunman was an 87-year-old man with links to white supremacist websites. CBS News named the shooter as James Von Brunn, but officials were not able to confirm the report.

The museum has been evacuated and it is unclear when it may re-open. Meanwhile, the Consulate General of Israel in New York City called the reported shooting “disturbing” and said it seemed “someone didn’t internalize the message.”