Concerns about possible drug activity at a new Sonoma apartment complex resulted in four arrests, Sonoma police said.

Officers went to the Valley Oaks Home complex on Tuesday morning and arrested Yadira Bojorquez, 25, of Boyes Hot Springs. They suspected her of having several baggies containing about three grams of methamphetamine, Sonoma police Sgt. Dave Thompson said.

Deputies returned to the Lyon Street apartments early Tuesday afternoon and arrested Banessa Soto Hernandez, 26, of Windsor, suspecting she had a knife. Hernandez was on probation for a prior conviction that included a regulation she not carry knives, Thompson said.

Apartment resident Jose Torres Navarro, 27, allowed deputies to search his unit. He was arrested after they found a small amount of methamphetamine.

Also arrested was a Boyes Hot Springs man with a pound of marijuana in his truck. The man was given a citation involving suspected marijuana possession and was released at the scene, said Thompson.

Hernandez, Bojorquez and Navarro were taken to the Sonoma County Jail.

Hernandez remained in custody Wednesday morning without bail due to the probation violation. The other two had bailed out.

Thompson said the affordable housing apartment complex, off West Spain Street, is less than a year old and is home to numerous families.

Some people have been calling police with concerns, including suspected activities at Navarro's apartment, Thompson said.

The large police presence Tuesday drew a crowd of neighbors, including many young children.

"Numerous residents were coming up and thanking us," Thompson said.

But he said the effort started with them. "They did a nice job calling in suspicious activities."