A Christian dying intestate has left no children but has left grand children who are the children of his deceased sons.  Please advice how the property is devolved?

All the grand children share the property of their grand father equally. 

We shall examine an example.  Mr. Stephen had two sons, Robert & Noble.  Mr. Robert has one son and Mr. Noble has two sons. Both Mr. Robert and Mr. Noble died before their father Mr. Stephen. Later, Mr. Stephen died intestate, leaving behind three grand sons. In this case each grand child will get equal share.