jerusalem israeli palestinian kill thursday two separate incidents israel occupy west bank officials say israeli man stab death southern israeli city arad police say probably terrorist attack investigation continue police units search suspect flee scene say police spokesman early day israeli settler shoot kill palestinian man west bank israeli army say response attack palestinians throw rock account palestinians deny israeli military say shooter open fire self-defense part group settlers hike near village qusrah come attack local villagers identify palestinian kill mahmoud odeh 48-year-old farmer deny clash take place shoot palestinian president mahmoud abbas condemn incident cowardly act evidence world ugly crimes conduct settlers unarm palestinians office say statement israeli military say troop arrive scene shoot israeli police say investigate incident wave palestinian street attack begin two years ago largely dissipate uncommon two deadly events occur day israeli palestinian kill two violent incidents