OKLAHOMA CITY (AP) - State and local law enforcement officers have arrested 305 people and seized 10 methamphetamine labs as part of a sting that included surveillance at 20 pharmacies in northeastern Oklahoma.

Oklahoma Bureau of Narcotics and Dangerous Drugs spokesman Mark Woodward said Tuesday the agency identified the top 20 pharmacies that sell pseudoephedrine products, which are used to make. methamphetamine.

Woodward says with the pharmacies' cooperation, officers watched for suspicious activity by customers who tried to purchase allergy or sinus medication.

He says the arrests began Friday in cities such Tulsa and Broken Arrow, and have included people who had previous convictions for meth possession. They face complaints including obtaining a controlled dangerous substance by fraud.

Oklahoma law requires medications containing pseudoephedrine to be kept behind pharmacy counters and it restricts purchases.