See Seattle Police Use Percussion Grenades to Dispel Occupy Protesters

The Occupy movement has taken its never-ending crusade to the nation's ports. On Monday evening, police in Seattle, Washington, used "flash bang" percussion grenades to remove protesters who were blocking the entrance to a Port of Seattle facility. A strong police response purportedly occurred after protesters began throwing bricks, paint and other materials at authorities.

Below, watch the chaos unfold:

The protesters had begun setting up aluminum and wooden crates in front of the entrance to Terminal 5, so law enforcement officially swooped in and put a stop to their efforts. Their response apparently included pepper spray in addition to the percussion grenades. Here's what the SPD Blotter had to say about the incident:

On December 12th demonstrators gathered on Harbor Island near Terminal 5 at the Port of Seattle. Demonstrators subsequently blocked vehicular traffic at Harbor Island and began throwing flares (which burns at 1400 degrees Fahrenheit), bags of bricks and paint, rebar (pictured above) and other debris at the police officers and police horses monitoring the demonstration. At least one officer was injured after being struck in the face with a bag of paint. The officer was treated at the scene by SFD medics and did not require transportation.

The West Seattle Herald produced a news report that documents the drama at Terminal 5 and Terminal 18. Traffic was apparently halted for 20 minutes as a result of the protestes' actions. The Herald has more:

Around 5 pm police lined up their bikes and 3 horses and began to forcibly move the people off the street near Terminal 18 and to remove some of the pieces of junk that had been used to form a makeshift barricade that had blocked traffic. People screamed and shouted angrily as they were forced back, Pepper spray, a flash grenade and just brute strength were used to move everyone back to the sidewalk and off the roadway. Many had previously left to go to Terminal 5 as they announced to the crowd that the purpose of the protest had been accomplished, they had "shut down all the ports on the West Coast. Police did make arrests for protestors who had laid down on railroad tracks.

In a video produced by the outlet, you'll see protesters blocking cars, organizing materials and creating havoc. Watch it, below (caution: language):

Here are some messages from the Occupy Twitter feed discussing what occurred:

 The Associated Press contributed to this report.