21.   One reason that the rallies were genuinely hard to contain, however, was that they were fueled by Palestinian frustration over their own plight.

22.   The Israelis added to Palestinian frustration with a Cabinet decision Sunday not to resume the handover of territory before late September.

23.   The killings came amid growing Palestinian frustration over the stalled peace talks with Israel, and there was concern that the incident could trigger widespread violence.

24.   The killings Tuesday came amid growing Palestinian frustration over the stalled peace talks with Israel, and there was concern that the incident could trigger widespread violence.

25.   The move to release the suspects came at a time when Palestinian frustration with the peace process and the performance of the Palestinian Authority was rising.

26.   The shooting came amid widespread Palestinian frustration over the deadlocked peace process.

27.   We understand the Palestinian frustration.

28.   But Israeli security fears after a wave of anti-Israeli attacks have delayed implementing the next stage of self-rule leading to Palestinian frustration with the process.

29.   But Israeli officials have increasingly suggested the deadline will be broken, adding to Palestinian frustration.

30.   But Israeli security fears after a wave of anti-Israeli attacks have delayed implementing the next stage of self-rule prompting Palestinian frustration.