Prosecutors say a Jordanian man has been arrested for allegedly stabbing to death his elder sister, 24, as she slept because he believed she was having an affair. The case is the first report of a so-called "honor killing" this year in Jordan, where about 20 women are killed annually by male relatives over perceived slights to the family name. Criminal Court prosecutor Ahmed Omari said the 21-year-old man killed his sister before dawn Wednesday in her bed, stabbing her 10 times with a kitchen knife. Omari said the unidentified suspect was arrested hours later and charged with premeditated murder. No trial date has been set. If convicted, the man could be sentenced to death.