The teen whose naked and burned body was discovered on a Brooklyn beach showed no signs of sexual assault, police sources familiar with the medical examiner’s initial report said yesterday.

Cops believe Shaniesha Forbes met one or more men on Facebook before her death and was likely strangled or smothered, or suffered a drug overdose.

The ME’s Office has not ruled the death a homicide and is still awaiting toxicology tests.

Shaniesha had burns on her face, hands and legs. The body was found by the ashes of a bonfire, along with an empty kerosene container and several beer cans at the Marine Park-Gerritsen Beach border Sunday. Her underwear was found several yards away.

The troubled teen left for school Friday morning and never returned, according to family members.

The shy ninth-grader’s uncle is an NYPD cop.