A post mortem is to be carried out this afternoon on the body of a 15-year-old girl who was found dead at a guesthouse in Dublin city centre this morning. An ambulance was called to the guesthouse in Talbot Street at seven o'clock this morning. Her male companion, believed to be in his 20's, raised the alarm when the girl failed to wake up. She was taken to the Mater hospital where she was pronounced dead on arrival. It is suspected that she died of a drug overdose.