Tense demonstrations outside the U.S. Immigration and Customs Enforcement building in Portland were declared a riot Saturday as federal officers once again faced off with protesters.

Federal officers in tactical gear are clashing with demonstrators and deploying smoke, tear gas and flash grenades, the Oregonian reports.

The largest is expected to take place in Portland, where at least five separate demonstrations are planned in and outside of downtown. Two downtown events will happen on Naito Parkway. One will gather at the Salmon Street Springs and another will form at the Battleship Oregon Memorial in Tom McCall Waterfront Park.

A nationwide protest is planned on President Donald Trump's birthday to counter a large military parade taking place the same day in Washington, D.C.

The procession, with more than 6,000 soldiers and 128 Army tanks, was one Trump tried to make happen in his first term.