WOODBURN, Ore. -- Oregon State Police seized about 51 pounds of cocaine and arrested three men during a traffic stop on Interstate 5.

An OSP trooper stopped a silver Mazda rental car after the driver swerved out of his lane at about 4 p.m. on Thursday, police said. The trooper said he suspected the driver of being under the influence.

A K-9 unit helped in the stop and discovered about $700,000 worth of cocaine -- 51 pounds, police said.

Three men were in the car: Joel Lucian Ruelas-Castro, 31, from Mexico; Manuel Alberto Castro Lugo, 38, from Mexico; and Rigo Humberto Lamas-Ponce, 29, from southeast Portland. Police said Lamas-Ponce also goes by the name Ivan Santiago-Mendes.

All three men have INS holds and were arrested on charges of unlawful possession, distribution and manufacturing of a controlled substance.

Last week, two men were arrested on Interstate 5 south of Canyonville with about 31 pounds of cocaine hidden in their vehicle, police said. The two seizures were unrelated.