A senior Saudi official told an international conference on security on Saturday that the "terrorist" threat remains and urged global cooperation to combat it.

"The danger of terrorism and terrorists still persists and affects several countries," Prince Turki bin Mohammed al-Saud of the foreign ministry told delegates at the opening of the two-day event.

Progressive Socialist Party leader MP Walid Jumblat and MP Nehme Tohme on Friday left for Saudi Arabia aboard a private plane, the National News Agency reported.

The Druze leader is scheduled to meet with various high-ranking officials, revealed al-Joumhouria newspaper on Friday.

Saudi Ambassador to Lebanon Ali Awadh Asiri slammed on Friday a caricature published in the Saudi al-Watan newspaper criticizing Maronite Patriarch Beshara al-Rahi's visit to Syria.

“The caricature doesn't depict the kingdom's stance from al-Rahi,” Asiri told the state-run National News Agency.

U.S. Secretary of State John Kerry said Thursday the death toll in Syria may have reached 90,000, citing figures given to him by his Saudi counterpart Prince Saud al-Faisal.

"I had occasion ... to speak this morning with the foreign minister of Saudi Arabia. The first thing he mentioned to me was in his estimate perhaps as many as 90,000 people who have been killed in Syria," Kerry told reporters.

Saudi Arabia's King Abdullah on Thursday appointed Prince Khaled bin Bandar bin Abdul Aziz as the new governor of the capital Riyadh, the official SPA news agency reported.

It said the king also named one of his sons, Prince Turki, as deputy governor in place of Prince Mohammed bin Saad, who had asked to step down.

Saudi Arabia on Thursday executed one of its nationals in Riyadh after he was convicted of murdering another man, the interior ministry said.

Shbib al-Otaibi was beheaded by the sword for killing a fellow Saudi, Faleh al-Shibani, following a dispute between the pair, said a ministry statement carried by the official SPA news agency.

In ultra-conservative Saudi Arabia, where the sexes are strictly segregated, traditional matchmakers face tough competition from blossoming marriage services on online social networks.

More than 200 Twitter accounts and dozens of other forums on the Internet offer services for Saudi men and women seeking spouses, angering matchmakers like Um Sami who sees it as "organised prostitution."

A lawyer filed a criminal complaint against the Saudi al-Watan newspaper on Wednesday for publishing a caricature criticizing Maronite Patriarch Beshara al-Rahi's visit to Syria.

Voice of Lebanon radio (93.3) said attorney Wadih Aql filed the complaint with the general prosecutor’s office against the newspaper's publisher, its editor-in-chief and the caricaturist, Jihad Awrati.

Riyadh governor Prince Sattam bin Abdul Aziz, a half brother of the Saudi king, died on Tuesday, state news agency SPA reported without saying what caused his death.

SPA quoted a royal statement as saying that Prince Sattam, who was in his 70s, would be buried in the Saudi capital on Wednesday. The brief report gave no other details about why and where the death occurred.

Saudi Arabia beheaded one of its nationals on Tuesday in the southwestern Aseer region after he was convicted of murdering a fellow citizen, the interior ministry announced.

Mohammed al-Qahtani shot dead Mueed al-Qahtani during a fight between the two, the ministry said in a statement carried by state news agency SPA.