Hyd Clutch not working on 2005 Hyundai Tiburon

My clutch went right to the floor in the middle of a shift, the pedal just dangles their, when i checked the fluid it was empty, I can find no signs of fluid leaking out. When I tryed to fill it back up and bleed the clutch the pedal has no pressure and the slave cylinder pushs out but will not return. Is it more likly that the master cylinder is bad or the slave cylinder?

Asked by for the 2005 Hyundai Tiburon
i would check both but i would check the master cylinder first that is the most common and most likely problem
2 more answers
hey i had the save problem in my 2006 and took it to the shop and they said my master cylinder was leaking internally, did your clutch res look like it had black particles in it