An Israeli woman stabbed by two Palestinians in a West Bank settlement has died of her wounds, a spokeswoman for Hadassah hospital in Jerusalem said on Tuesday.

Another woman who was less severely wounded in the same attack Monday at a grocery store in Beit Horon settlement, northwest of Jerusalem, was being treated at another hospital.

The two attackers were shot dead by security guards. Israeli police said one was in his early 20s while the other was a teenager.

The attack was the third inside a West Bank settlement since January 17, when an Israeli woman was stabbed to death at the entrance to her home in Otniel.

According to public radio, Prime Minister Benjamin Netanyahu has told the army to submit a "comprehensive plan" to better ensure the security of settlements.

Violence since October 1 has killed 159 Palestinians and 25 Israelis, as well as an American and an Eritrean, according to an AFP count.

Many of the Palestinians killed have been attackers, while others have been shot dead by Israeli forces during protests and clashes.