Three men were arrested in a Lane County drug bust Thursday morning where deputies also seized nearly 300 marijuana plants from two houses.

Authorities executed a search warrant at a Eugene house, located at 1490 W. 24th St., about 7 a.m., where they found an indoor pot-growing operation complete with fortified doors, a security system, dogs and guns, Oregon State Police said. There, detectives from the Lane County Interagency Narcotics Enforcement Team and the Eugene office of the Drug Enforcement Administration seized 190 marijuana plants and four guns.

Michael Cain III, 34, and Michael Steen Munter, 27, were taken into custody at the location, which is across the street from the Art & Technology Academy, a K-8 school.

Information gathered at the house led detectives to another residence, located at 3820 Dove Lane. There, detectives found another indoor growing operation with similar security and fortifications in place.

Authorities seized 109 marijuana plants and four pounds of processed marijuana at the Dove Lane location and arrested Joshua Steven Springer, 28.

All three men were later released pending a future court appearance, and face several drug-related charges.

The raid was the result of a year-long investigation that is ongoing, state police said.

-- Kate Mather