President Donald Trump's administration has sent thousands more troops to Los Angeles on a fourth day of chaotic protests against immigration raids, as the unrest spread to other US cities.

The Boston protest was one of many across the country in support of David Huerta, president of the California SEIU, who was detained by federal officials in Los Angeles on Friday.

LA residents who surveyed the damage after the protests on June 8 were disillusioned by what unfolded in their city and feared what might come next.

President Donald Trump is moving swiftly to act on his immigration promises with little internal restraint, determined to test the bounds of his executive authority in order to fulfill the promises of his reelection campaign.

Tensions are escalating in Los Angeles after protests against Immigration and Customs Enforcement gripped the city on Sunday, with demonstrators clashing with law enforcement and setting vehicles on fire downtown.

A Salvadoran restaurant in Los Angeles opened its doors to police officers injured in escalating protests against the deportation of illegal immigrants over the weekend. Pupuseria La Ceiba workers were seen on ABC 7 footage tending to deputies who appeared to be hit with tear gas in Compton.

The White House and Republican leaders in Congress are calling for quick passage of the centerpiece of President Trump's legislative agenda.

California officials have continued to maintain the deployment of 2,000 National Guard members is "unnecessary".