RIYADH, 22 October — A Saudi man and woman convicted of the murder of a man who had offered them a ride were executed yesterday, the Interior Ministry announced. A ministry statement said the two Saudis repeatedly stabbed Falah ibn Shuqair Al-Duwaish before strangling him with a wire and burning his body. They also stole his money and car. It said the victim, whose nationality was not given, had offered the man and woman a lift.