Syria agreed on Sunday to let the United Nations inspect the site of a suspected chemical weapons attack, but a US official said such an offer was "too late to be credible".
The United Nations said on Sunday its experts would start their probe of an alleged Syrian chemical weapons site on Monday.
Syria will give UN inspectors access to the site of the recent alleged chemical attack in the country.
Palestinian President Mahmoud Abbas said Saturday that he doesn't mind meeting Israeli Prime Minister Benjamin Netanyahu should newly-resumed peace talks proceed.
The use of chemical weapons in Syria would constitute a "crime against humanity", UN chief Ban Ki-moon said on Friday, adding there was "no time to lose" in probing alleged attacks which the opposition says killed hundreds.
Four rockets were launched from southern Lebanon into northern Israel on Thursday afternoon, the first time since 2011, breaking the short-lived calm in the volatile region.
Separate attacks across Iraq killed at least 37 people and injured 64 others on Thursday, the country's police said.
The United Nations demanded Syria give its chemical weapons experts immediate access on Thursday to rebel-held Damascus suburbs where poison gas appears to have killed hundreds just a few miles from the UN team's hotel.
Hosni Mubarak was flown from jail on Thursday in a symbolic victory for an army-dominated old order that has overthrown and imprisoned his freely elected Islamist successor.
French Foreign Minister Laurent Fabius said Thursday that "force" are needed if it is confirmed that the Syrian government forces used chemical weapons in the eastern suburb of Damascus.
Mubarak will leave jail as early as Thursday after a court ruling that jolted a divided nation already in turmoil seven weeks after the army toppled Islamist President Mohamed Morsi.
A Damascus opposition monitoring group said on Wednesday 494 people had been killed in a gas attack and shelling by President Bashar al-Assad's forces on Wednesday, citing data from medical centres in the Syrian capital.