A 30-year-old man stabbed his father to death in their house in Khamis Mushait on Saturday morning, authorities said.

"When we arrived at the crime scene, we found the body and arrested the murderer," said Col. Abdullah Al-Shathan, spokesman for Asir police.

Investigators are trying to determine the motive of the killer, he said.

The victim had two stab wounds and was pronounced dead on arrival at Khamis Mushait General Hospital.

The 70-year-old father worked as a muezzin, or prayer caller, at the Salam Mosque in Khamis Mushait.

A source said the son has a criminal record and that he committed the crime because he was annoyed by his father's repeated calls for him to perform prayers on time, the source said.