SAN FRANCISCO (AP) — Four teenage boys are facing charges and a police are looking for a fifth teen after a 16-year-old boy was found dead inside a San Francisco home.

Authorities have not released the cause of death but say Andy Zeng was found dead around 4:30 a.m. Sunday. Zeng is from San Francisco, but did not live in the home where he was killed.

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San Francisco police Lt. Troy Dangerfield told the San Francisco Chronicle that a 15-year-old suspect was arrested on suspicion of murder, attempted arson and conspiracy.

Three other boys, ages 15, 16 and 17, were each arrested on suspicion of attempted arson and conspiracy.

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Dangerfield says the attempted arson charges came after officers found what he described as “some type of incendiary liquid, either gasoline or kerosene.”

It’s not clear if the suspects had tried to destroy evidence after the killing.

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