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Dozens more people were arrested Sunday night as protests continued in Baton Rouge, Louisiana, following the fatal police shooting of Alton Sterling last week, authorities told NBC News.

Police and sheriff's deputies march down a street Sunday during protests in Baton Rouge, La. Shannon Stapleton / Reuters

At least 48 people had been taken into custody by midnight Sunday, said Casey Rayborn Hicks, a spokeswoman for the East Baton Rouge Parish Sheriff's Office. The new arrests followed more than 100 others that were made Saturday.

Among those arrested Saturday was DeRay Mckesson, a prominent leader of the Black Lives Matter movement. Mckesson, who released Sunday, livestreamed his arrest on Periscope.

"Arrests were inevitable," Col. Michael Edmonson, supervisor of the Louisiana State Police, said in a statement Sunday. "Our troopers maintained their poise and demeanor and focused on the job at hand, all the while enduring angry epithets and an occasional water bottle hurled from inside the crowd."

Edmonson told the Times-Picayune newspaper of New Orleans that some officers were struck in their heads by objects hurled as police chased a large crowd after a tense standoff.