Two Israeli soldiers killed in West Bank attack near Hebron, days before election

Two Israeli soldiers were killed by suspected Palestinian gunmen outside Hebron, and both attackers were shot dead after a gun battle, four days before Israel's general election. BBC

BBC NewsTwo Israeli soldiers killed in attack by suspected Palestinian gunmen in West BankThe two attackers were shot dead after a gun battle outside Hebron, four days before Israel's general election.

How much do events like this tend to shape voters' choices in the final days of a campaign, and how would you tell?