Based on past experience it can be taken in hand and then you need to report it to Police
They will run the numbers and determine if there is a report that refers to it as being lost or stolen.
Depending on the outcome actions will be determined.
It may go back to the owner who reported it lost or stolen
It may go to you if no reports and it cannot be identified (after appropriate period of time)
IMHO removing from harms way is reasonable and you cover yourself by reporting it and where has been taken.