Saudi Arabian authorities on Tuesday beheaded a foreign resident convicted of killing his mother, the Interior Ministry announced. The ministry said Misahri al-Enizi killed his mother by stabbing her with a knife in the northern town of Arara, according to a statement carried by the official Saudi Press Agency. The agency did not disclose al-Enizi's nationality or that of his mother. Saudi Arabia follows a strict interpretation of Islam under which those convicted of murder, drug trafficking, rape and armed robbery are executed in public with a sword. Al-Enizi is the third person to be executed this year in the desert kingdom, according to an Associated Press count. Saudi Arabia beheaded 137 people last year, up sharply from the 38 in 2006.