A woman was found mysteriously dead with head trauma in her friend’s Brooklyn apartment last night, police sources said.

The 44-year-old victim had slept over at her pal’s place on Batchelder Street in Sheepshead Bay and was last seen alive yesterday morning, sources said.

Her friend found her body on the couch at around 7:50 p.m. and called 911. The Medical Examiner’s Office will perform an autopsy.