At approximately 11:00 am law enforcement conducted a stop on a vehicle that was reported to be engaged in suspicious activity near the DAPL site at AR 117. This stop resulted in the arrest of 2 individuals. A small group of protesters conducted a demonstration at the Morton County Courthouse and Morton/Mandan LEC from approximately noon – 2 pm. No problems were encountered. At approximately 4:30 pm, riders on horseback left from Ft. Rice boat ramp to ride back to the camp on Hwy 1806. The TIP converted to a TCP while this took place due to the traffic hazard/obstruction created by the riders and accompanying vehicles. At approximately 6:20 pm, the riders reached the camp and Hwy 1806 was clear of horses and accompanying vehicles and the TCP converted back to a TIP.