The son of a woman whose dismembered remains were found in trash bags on New York City streets has been arrested, along with another man.

But police said Wednesday it's still unclear who killed 45-year-old Tanya Byrd.

Her 23-year-old son, Bahsid McLean, and an acquaintance of his, 26-year-old William Harris, have been arrested on charges of unlawfully dissecting a human body and hindering prosecution — but not on murder or manslaughter charges.

Police say they're still investigating, and one of the men may be responsible for her death.

It isn't immediately clear whether the suspects have lawyers. No phone numbers could be found for their homes.

A nearby resident walking a dog found a bag with some of the remains on a Bronx street Tuesday. Police then found three other bags on surrounding blocks.