Three rockets fired from Gaza hit southern Israel on Sunday, damaging two factories in the border town of Sderot but without causing any casualties, the Israeli army said.

"Two rockets hit two factories in the industrial zone in Sderot, while a third exploded in a nearby field," a spokeswoman said, referring to a town of 24,000 people which lies less than a kilometre (half a mile) from the border with the Hamas-run Gaza Strip.

Hundreds of bodies have been found in a town outside Damascus after a ferocious five-day assault by the Syrian army, a watchdog said on Sunday, as activists accused government forces of a "massacre".

At least 320 people have been killed during the offensive by government troops in Daraya, a satellite town of some 200,000 people to the southwest of the capital, the Syrian Observatory for Human Rights said.

Gaza's Hamas prime minister Ismail Haniya will not attend an upcoming Non-Aligned Movement summit in Tehran, Taher al-Nounou, a spokesman for the Hamas government, said on Sunday.

"The prime minister received a generous invitation from the Iranian president to participate in the NAM summit," he wrote in a statement, adding that Haniya initially "said he might be going but he decided today to apologize."

U.N. leader Ban Ki-moon on Saturday told Morocco's monarch he would not give in to demands to change his peace envoy on the Western Sahara conflict, diplomats said.

Morocco announced in May that it no longer has confidence in U.N. envoy

Egypt decided on Saturday to reopen a border crossing with Gaza it had mostly kept closed since a militant attack killed 16 of its soldiers on August 5, the official MENA news agency reported.

It said the Rafah border crossing, the Palestinian territory's only passage which bypasses Israel, would return to opening six days a week, like before the attack.

National assembly members have called for the sacking of Libya's defense and interior ministers over the security situation in the country, a member told Agence France Presse.

"There have been demands for the dismissal of the defense and interior ministers but the assembly has called for them to be summoned first to hear them. This should happen later today or tomorrow," he said, asking not to be named.

Palestinian president Mahmoud Abbas will boycott the Non-Aligned Movement summit in Iran if his Islamist rival Ismail Haniya of Hamas attends, a minister told Agence France Presse on Saturday.

"President Abbas will not take part in the Non-Aligned summit if Haniya is present, no matter what form his attendance takes," foreign minister Riyad al-Malki said in Ramallah, headquarters of the Palestinian Authority.

The head of a Tunisian TV channel whose satirical show was abruptly pulled last week at a time of strained relations between the media and government Saturday denounced the issuing of a warrant for his arrest.

However, Ettounsiya director Sami Fehri also told the Express FM radio station he would not fight the warrant.

Dozens of bodies were found on Saturday in a besieged town near Damascus where Syrian troops have been waging fierce attacks to try to crush rebel holdouts in the capital, a monitoring group said.

At least 15 civilians, including two women and three children, were also killed on Saturday in the town of Daraya, which lies just southwest of Damascus, the Syrian Observatory for Human Rights said.

Switzerland has pledged financial support to an independent network of doctors in Syria who are trying to create a field hospital in the conflict-torn nation, an official said Saturday.

Georg Farago, a spokesman for Switzerland's foreign ministry, said Switzerland would contribute 55,000 Swiss francs (45,800 euros, $57,000) and is willing to support other efforts that "aim to lessen the suffering of Syrians".