JERUSALEM: Israel said Monday it had arrested five alleged Hamas militants over the West Bank killing of a Jewish settler couple, as Prime Minister Benjamin Netanyahu pledged an iron fist against mounting unrest. Israeli troops shot dead a Palestinian teenager — the second killing in 24 hours — as dozens were wounded in fresh clashes in the occupied West Bank and east Jerusalem. The spike in violence has brought international calls for calm, with concerns the unrest could spin out of control and memories of previous Palestinian uprisings — so-called “intifada” — still fresh. A joint statement by the police, army and Shin Bet domestic security agency said the five men arrested were members of militant group Hamas and had confessed to shooting the Israeli couple in their car in the West Bank. Netanyahu is under pressure from right-wingers in his governing coalition after four Israelis have been killed in as many days and others wounded, including a two-year-old child.