Hamas, which rules the Gaza Strip, opposes the peace talks starting in Washington on Wednesday and is not taking part.
Four Israelis,two men and two women, one of whom was pregnant, were killed on the Tuesday night West Bank attack.
PA condemned the attack, saying it harms Palestinian interests.
Latest update 23:34 31.08.10
Hamas issued a statement on Tuesday claiming responsibility for the shooting attack in the West Bank that left four Israeli civilians dead.
The statement from the armed wing of Hamas, a group that opposes any dialogue with Israel, said the "Qassam Brigades announces its full responsibility for the heroic operation in Hebron."
"Hamas praises the attack and regards it as a natural response to the crimes of the occupation," said Sami Abu-Zuhri, a Hamas spokesman in Gaza, adding that the attack was proof "of a failure of security coordination" between Israel and the Palestinians.
The attack occurred around 7:30 P.M. on Route 60, when shots were fired at a private vehicle near the Bani Naim junction, south of Kiryat Arba. Preliminary reports showed the gunmen approached the vehicle and shot the victims multiple times at point-blank range.
Magen David Adom reported that the victims were two men aged 25 and 40 and two women, also aged 25 and 40, one of whom was pregnant.
The victims were all residents of the settlement of Beit Hagai in the southern Hebron Hills.
Hamas' military wing has claimed responsibility for the attack, which comes just a day before the White House effort to re-launch Mideast peace talks.
A statement from the armed wing of Hamas, a group that opposes any dialogue with Israel, said the "Qassam Brigades announces its full responsibility for the heroic operation in Hebron."
Hamas said it would carry out more operations after claiming the shooting.
"This attack is a chain in a series of attacks, some have been executed, and others will follow," Abu Ubaida, spokesman for the group, said.
The Palestinian Authority condemned the attack, saying it harms Palestinian interests.
This attack is the latest in shooting attacks on Israelis in the West Bank. In June, a police officer was killed and two others were wounded in a shooting attack on their vehicle outside Hebron, and in May two Israelis were hurt by broken glass when bullets hit their car on a different stretch of Route 60.
Click to view image: ' car of the 4 victims with bullet holes all over'
Click to view image: 'Israel Police officers surveying the scene of the '
Click to view image: 'Furios settlers confronting the soldiers'
Click to view image: 'The car of the victims'
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