Saudi Arabia’s crown prince said Thursday the kingdom wants to invest $600 billion in the United States over the next four years, comments that came after President Donald Trump earlier put a price tag on returning to the kingdom as his first foreign trip.

Bin Salman does not clarify source of funds, offered in US president's first call with a foreign leader since returning to office; figure represents more than half of Saudi GDP

Crown Prince Mohammed bin Salman said Saudi Arabia aimed to invest at least $600bn in the US over the next four years, as the kingdom sought to deepen ties with its most important western ally after the return of Donald Trump to the White House.