It has been a slow month for Palestinian Arab self-deaths, but that may only appear to be so because the reporting out of Gaza is essentially self-censored by every Palestinian Arab news source save for Palestine Press Agency, which doesn't seem to have real credentialed reporters there. It has been fairly accurate in many of its scoops, though.
It makes the count a bit difficult.
Anyway, PalPress reports that Hamas has killed someone named Mohammed Awad Abu Latifa in Khan Younis, bringing this year's self-death count to 12.
UPDATE: Clan Clash in Khan Younis, one 28 year old killed. 13.