The Trump administration sued Los Angeles claiming its sanctuary city ordinance helped fuel riots during protests against the president’s deportation crackdown, prompting the US to send in national guard troops.

President Donald Trump's administration sued Los Angeles on Monday over policies limiting city cooperation with federal immigration authorities, continuing a confrontation over the Republican's deportation efforts in a largely Democratic city.

The DOJ's lawsuit against Los Angeles is the latest against a "sanctuary" jurisdiction for restraining local cooperation with immigration enforcement.