10;15 p.m. UPDATE:

Large numbers of cars reportedly now are leaving McAdams Park, with a few walkers still heading along 13th Street. But a small group is reported on a ramp to Interstate 135.

10:00 p.m. UPDATE:

The demonstration remains peaceful, with the bulk of the crowd now back in McAdams Park. KAKE's Ben Jordan says a few people are heading to their cars, as if they might be leaving.

9:30 p.m. UPDATE:

Someone shoots off fireworks amid the crowd. A few people fear it might have been gunfire. No one apparently is injured.

KAKE's Ben Jordan reports some people now are marching back west on 13th Street, heading back toward Interstate 135.

9:20 p.m. UPDATE:

KAKE's Ben Jordan reports on Facebook Live the demonstration has all ages and races, carrying signs and waving fists in the air.

The crowd is heading east on 13th Street toward Hillside. A caller told KAKE News earlier in the evening a large number of police cars were parked at Wichita State University.

9:10 p.m. UPDATE:

The demonstration is now centered at 13th and Grove, on the other side of I-135 from Barry Sanders Field.

9:00 p.m. UPDATE:

KAKE's Ben Jordan reports protesters are trying again to climb the ramp to Interstate 135. Police are blocking their path. He estimates the size of the Black Lives Matter protest as 200 people.

8:50 p.m. UPDATE:

KAKE's Ben Jordan reports someone in the Black Lives Matter crowd threw a soda bottle at a man on a motorcycle who tried to talk with them. When the bottle was thrown, the biker left.

The marchers blocked 13th Street, but have been unable to get onto Interstate 135 because of a strong police presence.

8:30 p.m. UPDATE:

Black Lives Matter protesters came face-to-face with law officers near Interstate 135. They shouted slogans at the officers for several minutes, while a line of officers stood watching but saying nothing.

8:00 p.m. UPDATE:

Organizers of a Black Lives Matter in northeast Wichita say they plan to shut down Interstate 135.

"Whose streets? Our streets!" was one chant of the crowd as it moved toward the 13th Street ramps.

Video posted on the KAKE-TV Facebook page showed one of the organizers wearing a "Black Lives Matter" T-shirt, with the word "Black" in blue on purpose.

"In no way, shape or form am I against police officers," the organizer told the crowd. "But if I call 911, I want you to come help me. I don't want you to come kill me." The man added being a "blue life" is a choice, while being black is not.

Previous story:

Public safety vehicles lined Interstate 135 in Wichita Tuesday night, apparently in preparation for a Black Lives Matter rally.

The rally was called for 7:30 p.m. at Barry Sanders Field on 13th Street, near I-135. Similar rallies in other cities have turned into marches occupying freeways. One of them blocked a highway in Baton Rouge, Louisiana for hours Sunday night.

The rally began hours after Wichita Police Chief Gordon Ramsay met with several young black professionals. The meeting ended with Ramsay saying in a video he supported cultural competency training for officers, as well as other adjustments.