Nre -receipts

Whether NRE receipts when converted to NRO -whether they are taxable in India or they are treated as "Deemed to acrue or arise in other country" and are not taxable- pls suggest

If such receipts (NRO receipts)  invested in term deposits in india and draw interest they become "Deemed to acrue or arise in india" if yes my question is whether such non-resident can file a return here for the income earned here?