(Vancouver, WA) -- Police in Clark County are warning residents about a spike in thefts of Kia and Hyundai vehicles. The Vancouver Police Department and Clark County Sheriff's Office says they've seen an increase in the number of Kias and Hyundais being stolen over the past few weeks. Police say most of the suspects have been juveniles. Police are urging owners of certain Kia and Hyundai models to contact their dealership to see if they're eligible for a manufacturer security software update.