U.S. President Donald Trump can keep his deployment of National Guard troops in Los Angeles, according to a court ruling, as protests against immigration raids look set to enter their second week in the strongest backlash since his return to power in January.

The appeals court issued its pause just hours after Judge Charles Breyer wrote that Trump’s “actions were illegal." The 9th Circuit Court of Appeals will hear the case on June 17.

Police arrested more than 20 people, mostly on curfew violations, on the first night of restrictions in downtown Los Angeles.

Los Angeles endured a sixth day of protests that have been largely peaceful but occasionally punctuated by violence.

Trump’s trip comes as he faces criticism over deploying military in an attempt to quell immigration protests in Los Angeles.

The Guard’s arrival marks a potentially volatile phase in Trump’s push to ramp up deportations and in his contentious relationship with state and local authorities.

LA Mayor Karen Bass issued an overnight curfew for about 1 square mile in downtown LA, which has been the site of clashes between police and protesters over the last six days. Trump deployed 4,000 National Guardsmen and 700 Marines to LA against the wishes of Newsom and Bass.