Former Vice President Al Gore's daughter and other activists arrested at a protest of a natural gas pipeline in Boston have pleaded not guilty to misdemeanor charges.

Karenna Gore, activist Tim DeChristopher and nine others were arraigned Friday on charges including trespassing, resisting arrest and disturbing the peace.

Twenty-three protesters were arrested Wednesday when they tried to block construction of Spectra Energy's West Roxbury Lateral pipeline.

Several of those arrested struck deals to have their charges reduced to civil infractions or to serve probation.

Gore, DeChristopher and four others didn't agree to those conditions and were ordered back to court July 29. They also were ordered to stay away from the pipeline construction site.

Houston-based Spectra Energy Corp. says the pipeline will provide a reliable energy source.