Sporadic unrest continued to shake parts of Tunisia on Thursday, as authorities said more than 600 people had been arrested in a week of protest as anger at austerity measures boils over on the streets.

Authorities in southern California said on Thursday that dozens of residents were still unaccounted for after powerful mudslides that have killed 17 people, including four children, and destroyed homes in a region already pummeled by massive wildfires.

Armed robbers launched a spectacular raid on the world-famous Ritz hotel in Paris on Wednesday, making off with an estimated four million euros worth of jewels, the latest in a string of high-profile heists in the French capital.

Canada is bracing for a possible US withdrawal from the tripartite North American Free Trade Agreement, a source said on Wednesday, ahead of the next round of negotiations due to start in Montreal later this month.

 Britain plans to eliminate all avoidable plastic waste within 25 years, Prime Minister Theresa May will announce on Thursday as part of long-term plans for the environment.

The heads of seven southern European states pledged on Wednesday to up their efforts to tackle one of the most stubborn thorns in the EU's side: flows of migrants from war-torn and impoverished countries.

A powerful and shallow 7.6-magnitude earthquake hit the waters off the coast of Honduras late Tuesday, triggering tsunami threats and advisories for nearby Caribbean shores, though there were no immediate reports of damage or injuries.

President Donald Trump took command of a high-profile White House meeting on immigration on Tuesday, coaxing Republican and Democratic lawmakers toward a compromise on the fate of undocumented migrants who came to the United States as children.

Chinese authorities battling to prevent an environmental disaster after a collision between an Iranian tanker and a cargo ship said on Wednesday no major oil spill has been detected, but 31 sailors remained missing.