Police in Minot are preparing for possible protests at an oil industry conference.

The annual meeting of the North Dakota Petroleum Conference is scheduled to begin Monday in Minot.

The police chief says his department is aware that the three-day gathering could see protests.

The conference will feature a variety of speakers including gubernatorial candidates.

A federal judge declined to block the four-state pipeline last Friday, but federal agencies stopped work near Lake Oahe.

Federal agencies also asked pipeline operators to voluntarily stop work on a 40-mile stretch.