Four people were arrested today in connection with two suspected methamphetamine labs. Police discovered one in St. Paul last night following a fire at a building on West Seventh Street. And in Wright County today, two men were arrested after a hunter came across their meth lab. The Bureau of Criminal Apprehension estimates most of the meth consumed in Minnesota is imported from the southwestern United States and Mexico. But the number of local labs is growing, and the number of busts has roughly doubled every year since the mid-1990's. Tim O'Malley is a special agent in charge at the BCA. He says a disproportionate number of labs are still found in rural areas, where it's generally easier to conceal the smells and toxic waste associated with a lab.