Occupy Ottawa protestors moved through the city's core Wednesday evening. ((CBC))

A group of 150 to 200 Occupy Ottawa protestors have moved back to Confederation Park after marching through downtown in the early evening, snarling traffic in the city's core.

The protestors travelled down Wellington and then O'Connor towards the Sheraton Hotel on Albert Street, where they say a  meeting about Canada-U.S. relations is taking place.

The march began at 5 p.m., and disrupted some rush-hour traffic. Albert Street was already partly closed to traffic at Bay Street because of a natural gas leak.

Prior to the march, the group had mostly limited itself to Confederation Park.

Occupy Ottawa is part of a worldwide protest where people have taken over public spaces in many cities. Demonstrators are voicing their concerns about everything from the environment to the growing gap between rich and poor.