Definition of "unclaimed"

On his first day, Safdar went with another driver to collect one of the unclaimed bodies frequently found on the streets of Karachi.

2017 April 6, Samira Shackle, “On the frontline with Karachi’s ambulance drivers”, in the Guardian‎

The hovel stood in the centre of what had once been a vegetable garden, but was now a patch of rank weeds. Surrounding this, almost like a zareba, was an irregular ring of gorse and brambles, an unclaimed vestige of the original common.

1944, Miles Burton, chapter 5, in The Three Corpse Trick