A ship, two portable treatment plants and less than 90 days: that's the plan the Pentagon unveiled Thursday to destroy "hundreds of tons" of Syria's most dangerous chemical weapons.

After Albania refused to destroy the lethal "priority 1" chemical agents -- including mustard gas, sarin and VX nerve gas -- on its soil, the Organization for the Prohibition of Chemical Weapons (OPCW) turned to the United States.

The United States on Thursday condemned the bombing of a Yemeni defense ministry complex which left 52 people dead, and called on Americans not to travel to the country.

"We extend our sincere condolences to the families of the victims," deputy State Department spokeswoman Marie Harf said, condemning "the senseless killing and wounding of dozens."

Two teenaged Norwegian sisters who ran away from home in October, saying they wanted to help rebels in Syria, are indeed in the war-wracked country, a lawyer for their family confirmed Thursday.

The youngest, aged 16, is injured and has to be treated before she and her sister can leave Syria, the lawyer, Geir Lippestad, told Norwegian public broadcaster NRK. Norwegian media reported the 16-year-old had a bullet wound.

A Moroccan protester who broke into the compound of Algeria's consulate in Casablanca and tore down the country's flag during a diplomatic row was given a two-month suspended sentence Thursday.

The November 1 incident came during a demonstration against comments by Algeria's President Abdelaziz Bouteflika over the disputed Western Sahara, and a video of it was widely circulated on Moroccan websites.

An Israeli rights group said Thursday the military had closed its investigation into the 2011 death of a Palestinian protester hit in the face with a tear gas canister.

"The decision not to file an indictment against the soldier who killed Mustafa Tamimi, nor against his commanders, conveys the indifference of the military law enforcement system to the lives of Palestinians in the West Bank, and specifically towards Tamimi's death," B'Tselem said.

A top Palestinian negotiator on Thursday said peace talks with Israel were "difficult and complicated", after a meeting between Palestinian president Mahmoud Abbas and U.S. Secretary of State John Kerry.

"The situation is still very difficult and matters are complicated," Saeb Erakat told Agence France Presse.

Four Sudanese were killed on Thursday in an exchange of fire with Egyptian border guards, security officials said, adding that 10 more were wounded.

Clashes erupted between the illegal migrants and Egyptian military forces along the Egypt-Sudan border, the officials said, and the wounded were transferred to Aswan hospital.

Iranian parliament speaker Ali Larijani met Thursday in Muscat with Oman's Sultan Qaboos, as Tehran seeks to mend ties with Gulf states, ONA state news agency said.

Tehran enjoys good relations with Muscat, but is locked in a decades-long rivalry with Saudi Arabia, while some other Gulf countries are wary of the ambitions of their neighbor across the water.

A French report ruling out poisoning in Yasser Arafat's 2004 death has a glaring inconsistency, the co-author of a Swiss probe said Thursday, sticking by his team's conclusion that the Palestinian leader was likely killed.

"Our data lean more towards the thesis of poisoning than in the opposite direction," Professor Francois Bochud, head of the Lausanne Institute of Applied Radiophysics, told AFP.

The growing number of young Europeans joining al-Qaida-linked rebels in Syria pose a "potential threat" for the European Union and its allies, France and Belgium warned Thursday.

"The phenomenon is particularly worrying," French Interior Minister Manuel Valls said alongside his Belgian counterpart Joelle Milquet.