Hong Kong police launched an investigation into the death of an elderly woman in her home early on Monday after suspicious-looking red marks were observed on her neck, but initial fears of foul play have been dismissed.

At 1am, an Indonesian domestic worker found the 89-year-old woman unconscious on a bed in an apartment in the Tai Shing Building on Tune Street in Sai Ying Pun, an area in Western District, Hong Kong Island, Wen Wei Po reported.

The maid immediately called the old woman’s son, who called the police. Paramedics arrived but she was pronounced dead at the scene.

During an examination in a hospital, doctors found unusual red marks on the dead woman’s neck, and suspected that she had been strangled. They reported the case to the police.

Officers from the crime unit of Western Police District went to the apartment in Sai Ying Pun and took away some medicines and a scarf for investigation. They also asked the domestic worker to go to the police station to help with their inquiries.

However, police determined that it was a false alarm, as the red marks on the woman’s neck were probably caused normally, possibly by her scarf rubbing on her dry skin during recent cold weather, Apple Daily reported.

Police said foul play was not now suspected but the actual cause of death would be determined by an autopsy.