A top Republican lawmaker warned Sunday that US President Donald Trump's impulsive threats against other countries could set America "on the path to World War III," in comments capping an unusually hostile and public feud between the pair on social media.

US President Donald Trump sent Congress his immigration legislation priorities Sunday, including building a controversial border wall, speeding up deportations and dramatically increasing the number of officials involved in enforcement.

A man arrested after his car plowed into pedestrians in London's museum district, injuring 11 people and sparking fears of a terror attack, was released from custody Sunday, police said.

The 47-year-old was held at the scene of Saturday's crash on suspicion of dangerous driving, and questioned overnight over what police said was a traffic incident with no link to terrorism.

Two weeks after winning elections with a reduced majority, German Chancellor Angela Merkel took a first step Sunday toward forming a government by trying to unite her conservative camp which is bitterly divided over refugee policy.

Turkish prosecutors have demanded up to 15 years jail on charges of backing a terror group for 11 activists, most of whom were detained in a raid on a workshop led by Amnesty International, a report said Sunday.

Iran's judiciary confirmed on Sunday the five-year prison sentence given to a Canadian-Iranian member of its nuclear negotiating team on spying charges. 

Ten of thousands of flag-waving demonstrators packed central Barcelona on Sunday to rally against plans by separatist leaders to declare Catalonia independent following a banned secession referendum.

The crackdown in Catalonia is looming large over the Scottish National Party's autumn conference, where the leadership is under pressure from some members to address Scotland's own independence ambitions.

A Filipino suspect in a thwarted jihadist plot targeting New York's subway and Times Square will face legal proceedings seeking his extradition to the United States, the Philippine justice secretary said on Sunday.

North Korean leader Kim Jong-Un has promoted his sister to a senior ruling party post, state media said Sunday, and praised the country's nuclear weapons program which has sparked international alarm.