A protester holds a Black Lives Matter sign. (Evan Garcia / WTTW News)

Protests over the death of George Floyd while in the custody of Minneapolis police resumed Sunday afternoon in Chicago following a night of riots and looting downtown that prompted Mayor Lori Lightfoot to impose a citywide curfew and call on the Illinois National Guard for help.

“I will not let criminals take over our city and shame the majority of us,” Lightfoot said Saturday evening.

Access to the city’s central business district was restricted to those who live or work in the area; the city blocked off several entry points to the area and lifted drawbridges.

By 4 p.m. Sunday, crowds of protesters walked miles from the Loop along State Street south to 35th Street near the campus of Illinois Institute of Technology. There, dozens of police officers clad in riot gear corralled the group of about 100 protesters, blocking their access to the west, east and south. Members of the Illinois National Guard were also on the scene.

After a standoff of about an hour, protesters marched northward towards the Loop and were joined by several other groups of demonstrators.

In the River North neighborhood just north of the Loop, several violent altercations between police and protesters took place as the 9 p.m. curfew neared. Officers deployed tear gas and made several arrests.

Police officers later blared messages in English and Spanish in an attempt to clear the area. 

Below, photos from the scene on Sunday:

Most of the drawbridges spanning the Chicago River were lifted, presumably to control crowds, during protests Sunday. (Evan Garcia / WTTW News)

Protesters yell at a line of police officers at State and 35th streets, about 3 miles south of the Loop, where police set up a blockade. (Evan Garcia / WTTW News)

Police officers form a line to block the west side of State Street. (Evan Garcia / WTTW News)

Protesters march toward Trump Tower from State and 35th streets as Chicago police officers on bicycles follow behind. (Evan Garcia / WTTW News)

A police lieutenant smokes a cigar as the city’s 9 p.m. curfew sets in. (Evan Garcia / WTTW News)

Police officers douse a man with water after he was pepper-sprayed at Wabash Avenue and Grand Street. The man was taken into police custody. (Evan Garcia / WTTW News)

Police officers on horseback line up near the LaSalle Street bridge, the only visibly lowered bridge in the area. (Evan Garcia / WTTW News)

Two members of Chicago Police’s SWAT team block people from traveling northward on Wabash Avenue after the 9 p.m. curfew. Exceptions were made for people who live in the area. (Evan Garcia / WTTW News) Onlookers photograph the police presence on Wabash Avenue behind a barricade. (Evan Garcia / WTTW News)

Follow Evan Garcia on Twitter: @EvanRGarcia