Israeli security forces reinforced their presence in the occupied West Bank on Saturday and made arrests after the killing of a guard at a Jewish settlement. The Al-Aqsa Martyrs’ Brigade, one of the main militant groups present in the West Bank, claimed responsibility for the murder which — along with the killing of a Palestinian, brought a deadly conclusion to a Friday marked by clashes at Jerusalem’s flashpoint Al-Aqsa mosque. The army said the guard was on duty at the entrance to Ariel settlement on Friday night when attackers opened fire. Emergency services confirmed that the man, in his 20s, had died from his wounds. Soldiers on Saturday stepped up their presence particularly at the entrance to the neighbouring Palestinian community of Salfi, an army statement said. It added that security forces had made arrests and seized weapons at Bruqin, also nearby, and at the Balata refugee camp. The group which on Saturday said it carried out the attack is the armed wing of Palestinian president Mahmud Abbas’s Fatah faction. “We claim responsibility for the heroic operation in the colony of Ariel in which a Zionist officer was killed, in response to violations committed by the occupation government in Jerusalem,” the group said. Late Friday the Palestinian health ministry said a Palestinian in his 20s had been shot and killed during an Israeli army operation in the northern West Bank town of Azzun. Forty-two people had earlier been hurt in clashes between Palestinians and Israeli police, according to the Palestinian Red Crescent, at the Al-Aqsa site venerated by Muslims and Jews in Jerusalem’s old city. The unrest occurred on the last Friday in the Muslim holy fasting month of Ramadan, and brought to nearly 300 the number of Palestinians hurt over a two-week period in clashes there. Al-Aqsa mosque compound is in east Jerusalem, which Israel captured in the 1967 Six-Day War, along with the West Bank, and later annexed, in a move not recognised by most of the international community. Israel has since built settlements in the West Bank that are considered illegal under international law but are home to around 475,000 Israelis.