A Saudi-led coalition has warned Yemen's rebels threaten ships in the Red Sea through their control of a key port, days after rebel warnings over a coalition blockade.

Saudi-led coalition air strikes on a marketplace and house in rebel-held northern Yemen have left at least 14 people dead, witnesses and a rebel-run news agency said Thursday.

A third night of unrest has shaken Tunisia where authorities said Thursday more than 600 people have been arrested this week as anger at austerity measures boils over on the streets.

Tunisia is considered a rare success story of the Arab Spring uprisings that began in the North African country in 2011 and spread across the region, toppling autocrats.

Israeli authorities have approved more than 1,100 new settlement homes in the occupied West Bank, the Peace Now NGO said Thursday, the latest in a raft of such moves in recent months.

The approvals were given on Wednesday by a defence ministry committee with authority over settlement construction. 

Syrian regime forces faced fierce resistance from jihadists Thursday as they fought to capture a key airbase in Idlib, the last province beyond the government's control, a war monitor said.

Arab foreign ministers will meet early next month to discuss steps against U.S. President Donald Trump's recognition of Jerusalem as Israel's capital, the Arab League said Wednesday.

Turkey on Wednesday called on Russia and Iran, the two chief allies of President Bashar al-Assad's regime in Syria, to halt an air offensive on the rebel-held Idlib province near the Turkish border.

Drones that attacked Russian bases in Syria last week were sent from Idlib, a "de-escalation" zone controlled by anti-Damascus fighters, the Russian defence ministry's official newspaper said Wednesday.

More than 200 people have been arrested and dozens hurt during clashes in several parts of Tunisia, the interior ministry said Wednesday, after a second night of unrest driven by anger over austerity measures.

The North African country has been hailed for its relatively smooth democratic transition since its 2011 uprising, but seven years after the revolution tensions over economic grievances are high.

Israeli forces set up roadblocks and deployed around a major Palestinian city in the occupied West Bank on Wednesday in a manhunt for attackers who shot dead an Israeli settler.