RIYADH: Saudi authorities arrested two people in separate operations for selling narcotics, state news agency SPA reported on Tuesday. The General Directorate of Narcotics Control (GDNC) arrested a Saudi national in Qassim for selling hashish and amphetamines.  Another was arrested in Riyadh for selling hashish and pills subject to regulation of medical use.   Both people have been referred to the Public Prosecution.  Elsewhere border guards in the Al-Dayer sector of the Jazan region thwarted an attempt to smuggle 68kg of qat.  The seized individuals were handed over to authorities.