PITTSBURGH — Several protest groups staged demonstrations around the city today and a protesters' coalition planned an unpermitted march called a "People's Uprising" as world leaders arrived in the city for the Group of 20 Summit.

The meeting begins this evening and ends late Friday afternoon after a day of meetings.

Dignitaries were arriving in waves and were heading to a city under heavy security.

Protesters seeking human rights reforms in China gathered in a designated protest area near the meeting site.

About 15 monks from the International Burmese Monks Organization wore saffron and crimson robes and chanted through a bullhorn in a late morning march through downtown. The group was commemorating the second anniversary of the 2007 Saffron Revolution in Burma.

The monks carried Buddhist flags and were followed by about 40 or 50 supporters, some carrying signs of the Democracy leader in Burma that said "Freedom to lead."

Earlier in the day, Oxfam America held a mock football game. A dozen activists wore Steelers uniforms bearing the names of world leaders and large photos of their faces to spotlight hunger issues.

On the Web site of the Pittsburgh G-20 Resistance Project, an umbrella organization of protest groups, representatives describe plans for the "People's Uprising." They call it "a mass march" that will begin in the afternoon in a neighborhood northeast of downtown and end at the David L. Lawrence Convention Center, the primary site of the summit.