An undercover narcotics investigation led to the seizure of 4,600 pounds of marijuana worth about $2.3 million, and the arrests of four men Friday.

An earlier tip led to the surveillance of a house by the Pima County Sheriff's Department narcotics and special investigations section, which led to a traffic stop Friday, said Deputy Courtney Rodriguez, a sheriff's department spokeswoman.

Deputies initially tried to stop a vehicle, which fled for a short distance and then stopped. Two men ran from the vehicle, Rodriguez said.

The men were captured by a canine unit, and deputies found numerous bales of marijuana weighing more than two tons in the vehicle, said Rodriguez.

Detectives searched the vehicle and three residences after the issuance of search warrants. 

Investigators declined to release where the traffic stop was made, the type of vehicle seized, or the location of the residences that were searched because the case remains under investigation, Rodriguez said.

The two men in the vehicle who were arrested were Rafael Ponce-Soto, 22, and Daniel Lopez Maciel, 35, said Rodriguez. Both were facing possession of marijuana for sale and unlawful flight from law enforcement. Maciel also was facing possession of narcotics, said Rodriguez.

Arrested during the search of the residences were Martin Gonzalez, 48, and Daniel Noe Zavala, 40. Both were facing weapons violation, possession of marijuana for sale, manufacturing or transportation of marijuana for sale, possession of narcotics and possession of a dangerous drug, Rodriguez said.