It exemption on hra and interest on housing loan both

Hi, I need a clarification, can an employee claim both income tax exemption on HRA and interest on housing loan both,

he is having own house in the same city, and submitting that he is residing in rented house and submitting rent receipt and bank statement towards interest on housing loan, can he claim both, clarify with income tax rules

If he is owning an flat & also staying in an rented house then he can claim both exemption for HRA & interest.  The only condition for claiming HRA exemption is that he should be receiving HRA & paying rent.  for this he shud have the rent receipts available.