Capitol Police arrested a gunman outside office buildings near the US Senate on Tuesday.

Officers arrested the armed man “in the park across from Union Station,” according to a Capitol Police statement.

“At this time we have no reason to believe there is an ongoing threat,” the statement read. “We are working to gather more information and will put out more details when they are confirmed.”

In a separate alert, officers alerted members, staff and press to the presence of a suspicious package “in the Upper Senate Park.”

They advised all to avoid the area until further notice.

Tensions have remained high on the US Capitol complex following a pro-Palestinian rally in Washington, DC, on Saturday, during which tens of thousands of demonstrators marched and later swarmed the White House.