Several dozen demonstrators, the last holdouts from a mass protest of the Dakota Access Pipeline, faced off against riot police on Wednesday as they defied a deadline to end their months-long occupation of an encampment on federal land.

Police arrested a handful of protesters who confronted them with taunts late in the day outside the camp entrance, then retreated as tensions mounted in the standoff, about 40 miles south of Bismarck, the state capital. State officials said about 10 arrests were made throughout the day.

President Donald Trump has pushed for the completion of the pipeline since he took office last month, signing an executive order that reversed an Obama administration decision and cleared the way for the $3.8 billion project to proceed.