The United States Capitol building was the latest site of suspected violence today. MSNBC reports that the Capitol was locked down after shots were fired at the visitors center:
Police locked down the US Capitol complex on Monday amid reports of shots fired, officials said.
Roads near the visitor center were shut down, and nobody was being allowed to enter or exit the buildings, officials said.
“If you are outside, seek cover,” the alert said...
Initially there were reports of a police officer being shot, but NBC News has since confirmed that was not the case.