About 150 activists disrupted a federal auction for offshore oil and gas leases on Wednesday at the New Orleans’ Superdome, taking over what’s normally a sedate meeting to make a statement against fossil fuels.

The anti-drilling protest included members of national environmental groups, community advocates and indigenous rights groups who want the Obama administration to close off the Gulf of Mexico to more offshore development.

“There was singing and chanting, and the industry guys actually managed to hold the lease sale over all the yelling,”  Marissa Knodel, a climate campaigner with Friends of the Earth who marched with the group on Wednesday told Grist, adding that the protestors stayed in the room for about an hour as the auction continued. “We definitely made a strong stand.”