Hamas vowed on Thursday to carry out more attacks against Israelis at the start of fresh peace talks between Israel and the Palestinians.
Palestinian President Mahmoud Abbas is meeting Israeli Prime Minister Benjamin Netanyahu for the first time in nearly two years.
Hamas, which controls the Gaza Strip, has been excluded from the negotiations in Washington DC because the US, the EU and Israel do not recognise the Islamist group.
“The Washington talks are illegitimate and Mahmoud Abbas has no right to speak in the name of the Palestinian people,” Hamas spokesman Sami Abu Zhuri told reporters.
The group’s intervention comes after a shooting on Wednesday wounded two people and the murder of four Israelis on Tuesday.
Hamas said its gunmen carried out both attacks.
Settlers have responded by digging foundations and pouring cement at several sites in the West Bank.
Their protest is in defiance of a government-imposed moratorium, which is set to expire on 26 September.
Hamas promises more attacks on Israel