OAKLAND -- Heavily armed FBI and Oakland police SWAT teams pulled three pounds of marijuana, narcotics, a large amount of ammunition and stacks of cash out of an Elmhurst district home Tuesday afternoon and arrested eight men on drug and weapons charges, police said.

The names, ages, cities of residence were not released pending criminal charges by the Alameda County District Attorney's office.

The raid started about 1:50 p.m. at the house in the 2300 block of 90th Avenue, where an FBI armored vehicle and an Oakland Housing Authority police dog worked the ground and an Oakland police helicopter helped from the air, said police spokeswoman Officer Johnna Watson.

Watson said the safety of residents and community members was key in the raid. Before coming into the area, police locked down nearby Castlemont High School for the safety of the students and surrounding streets were shut down for several hours during the raid and search.

Watson said the raid was a result of an ongoing joint investigation but did not provide additional details.

Contact Harry Harris at hharris@bayareanewsgroup.com. Follow him at Twitter.com/hharris15. Reach Kristin J. Bender at kbender@bayareanewsgroup.com. Follow her at Twitter.com/kjbender.