As the Trump administration moves forward with its immigration agenda, immigration advocates across the country are mobilizing to protest.

Draped in Mexican and Salvadoran and flags, roughly 1,000 demonstrators gathered near City Hall shortly before noon, blocking traffic at Spring and Temple streets

The protest began on LA's historic Olvera Street - which dates back to Spanish and Mexican rule - in the morning ahead of a march to City Hall

A massive rally protesting President Donald Trump’s mass deportations and immigration policies blocked traffic on the Hollywood (101) Freeway in downtown Los Angeles Sunday. The protesters gathered Sunday morning on Olvera Street for what the Los Angeles Police Department called a non-permitted demonstration.

Marchers have blocked all lanes of U.S. 101, causing traffic to back up in both directions and on downtown surface streets.