RAMALLAH, West Bank — As Palestinians observe the 15th anniversary of the second intifada, a third intifada appears to be brewing in the West Bank, one that would require new strategies.

An atmosphere recalling the Al-Aqsa intifada (2000-2005) has prevailed in the West Bank since earlier in October, when the Israeli army sent hundreds of troops into Palestinian towns and closed military checkpoints, while settlers also attacked Palestinian villages.

These incidents followed the death of two settlers — an Israeli intelligence officer and his wife — in an Oct. 1 shooting near the settlement of Itamar, near Nablus in the West Bank. Another two settlers were stabbed and shot to death Oct. 3 in Jerusalem, while the Palestinian perpetrator, Muhannad Halabi from al-Bireh, was killed. Officials said Halabi apparently killed the settlers as a response to settlers raiding Al-Aqsa Mosque.

Later, clashes across the West Bank broke out between Palestinians and Israeli forces and settlers. The Oct. 3 clashes led to the death of young Fadi Aloun in Issawiya, who was shot by settlers who claimed Aloun tried to stab one of them, although witnesses denied the settlers’ story.