Egypt's president made an unannounced visit to the Sinai Peninsula Saturday to rally troops following a wave of deadly attacks on security forces by the Islamic State jihadists, his office said.

"President Abdel Fattah al-Sisi is inspecting troops and police in the North Sinai," his office said without specifying where in the restive province.

Lawless Libya has become a magnet for radical militants who receive weapons training in jihadist camps before launching deadly attacks in other countries, like last week's beach massacre in Tunisia.

The oil-rich North African country bordering Tunisia has rival governments and parliaments as well as a slew of armed groups vying for power in the aftermath of its 2011 uprising that toppled dictator Moamer Kadhafi.

Two coalitions of Syrian rebels battled to advance in government-held western Aleppo Saturday, seizing an army barracks in one district, but being pushed back elsewhere.

The fighting in the country's former economic powerhouse is some of the fiercest since the Syrian conflict arrived in the northern city in mid-2012.

Tunisian Prime Minister Habib Essid told the BBC on Friday that police took too long to react to last week's jihadist attack that killed 38 people, mostly Britons.

"The time of the reaction -- this is the problem," Essid told the British broadcaster. Police had been "blocked everywhere," he added.

A Saudi policeman was shot dead on Friday during a raid in which three people were arrested and flags of the Islamic State group were found, the interior ministry said.

The killing came with the Gulf region on alert against attacks by IS, which has been blamed for killing other Saudi policemen and has claimed three deadly mosque bombings in the kingdom and Kuwait.

Two rockets fired from Egypt's violence-plagued Sinai Peninsula exploded inside Israeli territory on Friday without causing casualties, a military spokesman said.

"Two rockets fired from Sinai struck southern Israel, but without causing casualties or material damage," the spokesman said, without elaborating.

Dozens of Shiites and Sunnis prayed side by side Friday in a mosque near the capital of Bahrain, a country hit since 2011 by Shiite-led protests against its Sunni rulers.

Residents said tight security was in place for the special session of weekly prayers in a mosque at Diraz, a Shiite village west of Manama.

Palestinian Islamist movement Hamas on Friday dismissed as "propaganda" an Israeli claim that it provided support related to this week's jihadist attacks against Egyptian soldiers in Sinai.

"The occupation's (Israel) statements about Hamas helping IS are stupid accusations... and propaganda that aims to incite against Hamas," spokesman Sami Abu Zuhri told AFP, referring to the Islamic State group, whose fighters carried out the attacks.

Palestinian forces have arrested around 100 Hamas members in the West Bank, a security official said Friday, raising tension between the Islamist movement and its Ramallah-based rivals.

The people, arrested overnight, "intended to carry out attacks against the Palestinian Authority (PA)," the official said, without elaborating.

A Saudi and a Kuwaiti are among four suspected al-Qaida members killed by an American drone strike in southeastern Yemen, a local official said on Friday.

The dawn strike targeted their car as it left the base of the 27th Mechanized Brigade in the Hadramawt provincial capital Mukalla, the official told Agence France Presse.