Protesters block Chain Bridge Road near the Fairfax County Courthouse Monday as part of Showing Up for Racial Justice, a series of demonstrations by white activists across the country to draw attention to police shootings of African Americans. Four people were arrested for blocking morning rush-hour traffic. (Tom Jackman/TWP)

Four people were arrested Monday for blocking morning rush-hour traffic in Fairfax City, Va., as part of a series of protests in six cities against police violence.

The arrested protesters were in a group of about 20 demonstrators from Showing Up for Racial Justice, a national network of organizations that on Monday staged rallies by white activists calling for racial justice.

The group had scheduled events in six cities, including Philadelphia and Portland, Ore. The effort follows the fatal police shootings last week of two black men, Philando Castile in a suburb of Minneapolis and Alton Sterling in Baton Rouge, and the deadly ambush of five police officers in Dallas by a black man who said he was angry about police violence.

The demonstrators in Northern Virginia started their protest shortly before 9 a.m. at the Fairfax County jail.

A protester is lead away after blocking Chain Bridge Road. (Tom Jackman/TWP)

There, they delivered a letter addressed to county Sheriff Stacey Kincaid demanding that disciplinary action be taken in the 2015 stun gun incident that killed Natasha McKenna, a mentally ill woman who died after a struggle with sheriff’s deputies inside the jail.

“We’re asking that Sheriff Stacey Kincaid fire the six officers who tortured Natasha McKenna,” said Cat Clark, who helped organize the demonstration.

Kincaid and the deputies involved in the incident are defendants in a wrongful death lawsuit filed last month by McKenna’s family.

Her spokeswoman declined to comment on the demonstration.

Sgt. Natalie Hinesley, a Fairfax City police spokeswoman, said the group marched from the jail to nearby Chain Bridge Road and blocked traffic for about 30 minutes.

After they were asked to disperse several times, four of the activists were taken into custody and now face misdemeanor charges for obstructing traffic, Hinesley said.