Several Grass Valley men reportedly ran from Narcotics officers who swarmed in after allegedly witnessing a drug transaction Friday. After a pursuit that drew the assistance all three of Nevada County’s law enforcement agencies, five men involved were arrested, according to authorities. It all started on the 1300 block of East Main Street in Grass Valley, where members of the Nevada County Sheriff’s Office’s Narcotic Task Force were conducting surveillance on a residence belonging to a reprtedly known drug dealer, Patrick “Jimmy” Patterson, 37, who had five warrants out for his arrest, said Deputy Jeff Martin. “We thought we saw …