Denison police say they’ve picked up two more men in a drug investigation that already led to six people being arrested earlier in the week. Late this week police arrested 24-year-old Jacobo Rojas on charges of meth possession, intent to deliver and failing to have a drug tax stamp, and 18-year-old Hector Lopez Alvarado on charges of conspiracy to deliver methamphetamine. Early Thursday morning officers who executed a search warrant in the south part of Denison had arrested six other people on similar charges. They’re all jailed in Crawford County and the case remains under investigation.