The first day of a protest on the Hennepin County Government Center plaza on Friday was capped by a march through downtown Minneapolis of 350 people to the Federal Reserve Bank that the organizers had not planned for, and in fact, did not endorse.

But the crowd wanted it, and one of the march's impromptu organizers, Tyler Nord, 23, had a quick meeting with Minneapolis Police Inspector Kris Arneson who said the protesters could march on the street itself, police vehicles would lead it and shut off traffic to speed the demonstration along.

"I think it will go faster vs. going on the sidewalk," Arneson explained to me. The march set off briskly and without a hitch, and after about a half hour on the Reserve Bank plaza, they returned to the Government Center plaza, eight blocks away. Capt. Dave Zimmer of the Hennepin County sheriff's office told me that there had been discussions beforehand about how to handle such a demonstration. Zack Zummallen, 26, of Minneapolis, one of the activists organizing the occupation, said there were a lot of different groups on the plaza, and though OccupyMN leaders didn't want the march, others did. He said that instead of discouraging the march, he recommended those who favored it to to talk to the police. "We helped them talk to the police," he said. While Arneson and Nord were hashing out details, law enforcement authorities are trying to keep up with the developments. The sheriff's office, Minneapolis police and transit police, have set up a joint incident command post that will operate while the protest continues, which could last days, weeks, or longer. Zimmer gave me a quick tour of the command post on Friday. In a large room, the command post can watch live video of the plaza protest, although itwas turned off when I was in the room. Officers were sitting at laptops and one of them was watching the plaza with a telescope. Also on hand were representatives of the Minneapolis Fire Department and the Hennepin County Medical Center emergency medical service staff. Posted on one bulletin board were the times when the protesters will be allowed to have amplified sound and on another board, the number of law enforcement officers that are immediately available. Sheriff Rich Stanek has said he hopes there will be no arrests, and he joked with one of the organizers on the plaza on Friday afternoon. Michelle Gross, president of Communities United Against Police Brutality, was at the plaza in the morning, and said that on Wednesday, she had trained a group of about 45 people who are involved in the protests in a discussion of their rights and "how to keep safe in interaction with the police." Gross told me she hoped there would be no incidents of brutality but said her group planned to remain "vigilant." She said the biggest problems involving police in Wall Street demonstrations recently has been at night when there are fewer protesters. Some protesters plan to stay overnight, even though tents are prohibited. Ray Stowers, 22, of St. Paul, one of the organizers of OccupyMN, said she was not worried if it rained. "It's just water," she said. She said she brought along an extra pair of socks. .