A rocket fired from the Gaza Strip landed in southern Israel on Tuesday, causing no damage or injuries, an Israeli police spokesman said.

"One rocket was fired earlier this morning from Gaza and landed in an open area in the Eshkol region," Israeli police spokesman Micky Rosenfeld told Agence France Presse.

Hamas leader Khaled Meshaal, who survived a 1997 Israeli assassination bid, has confirmed he wants to step down after eight years in post, the Islamist movement said on Saturday.

"Political bureau chief Khaled Meshaal has notified Hamas's consultative council that he does not wish to be a candidate for the movement's future leadership," a statement said.

Israeli Special Forces detained two Palestinians early on Thursday morning near the southern Gaza city of Rafah, a security official told Agence France Presse.

The official, who spoke on condition of anonymity, said the Israeli forces "crept into the Rafah area and took two citizens to an unknown destination and there is no information on what happened to them."

Underground train travel to bypass a chaotic traffic system? Welcome to Gaza, one of the world's most crowded places, where a conceptual art installation expresses this tantalizing idea.

Palestinian artist Mohamed Abusal erected luminous red metro signs in 50 different, and often unlikely places, across the Gaza strip, the dusty coastal territory measuring 40 square kilometers and home to some 1.6 million people.

A rocket was fired from the Gaza Strip into Israel on Thursday morning and hit without causing any damage or injuries, an Israeli police spokesman said.

"A rocket fired from the Gaza Strip exploded in the Sdot Negev region without causing any injuries or damage," he told Agence France Presse.

Israel's Supreme Court has rejected constitutional challenges to a law that makes it more difficult for Palestinians to get permission to live with their Israeli spouses inside Israel.

The ruling indicates that six judges ruled in favor of maintaining the law late Wednesday. Five were against.

A Fatah delegation was on Friday prevented from entering the Hamas-controlled Gaza Strip where they were to have held reconciliation talks with the Islamist movement, Fatah said.

The planned visit comes as Nabil Shaath, a member of Palestinian President Mahmoud Abbas' Fatah party's central committee, has been in Gaza since January 2 for talks with Hamas leaders and other Palestinian representatives on implementing a reconciliation deal.

Gaza's Hamas Prime Minister Ismail Haniya said support for Palestine should be a "religious and nationalist commitment" as he arrived in Tunis Thursday to a welcome from Tunisia's new leaders.

"Palestine is not a banner that we brandish like nobody's business, it's a religious and nationalist commitment," said Haniya after a meeting with Tunisia's moderate Islamist Prime Minister, Hamadi Jebali.

Gaza's Hamas Prime Minister Ismail Haniya will Monday meet the head of an Islamic aid group whose Gaza-bound vessel was stormed by Israeli troops in 2010 in a raid that left nine activists dead.

Haniya, who is making his first trip abroad since Hamas rose to power in Gaza in 2007, will tour the Turkish passenger ship Mavi Marmara and meet relatives of the victims.

Two mortar shells fired from the Gaza Strip landed in southern Israel on Sunday, causing no damage or injuries, an Israeli police spokeswoman said.

"Two mortar shells fired from the northern Gaza Strip fell this morning in the Eshkol district, there was no damage or injuries," Luba Samri told AFP.