Several shots have been fired at the National Museum of the Marine Corps building in Virginia, the FBI said Friday.

No injuries were reported.

It is the second time the Marine Corp museum has been fired upon in recent days. In addition, two other military buildings in the Washington area, including the Pentagon, also have been shot at. All the previous shots came from the same weapon, authorities said.

The latest incident occurred Thursday night, said Gwen Adams, spokeswoman at the National Museum of the Marine Corps. No one was in the building at the time, she said.

Slugs were found in the glass and metal structures but not inside, Adams said.

The museum was closed Friday morning while the investigation continued, the spokeswoman said. It will most remain closed for the rest of the day, she said.

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(Source: CNN)