A suspect was arrested in connection with threats made against state lawmakers who planned to attend Saturday's "No Kings" protest at the Texas Capitol in Austin, according to the Texas Department of Public Safety.

Thousands protested in Central Texas on "No Kings Day," opposing perceived authoritarianism on a day marking Flag Day and Trump's birthday.

AUSTIN, Texas — As the official "No Kings" protest at the Texas Capitol ended, police closed a number of streets in Downtown Austin as protesters began walking through downtown.

The Texas Department of Safety has identified a “credible threat toward state legislators” attending Saturday's “No Kings” protest at the Capitol.

Gov. Greg Abbott said more than 5,000 Texas National Guardsmen are strategically positioned throughout the state to support local law enforcement. That's on top of 2,000 DPS troopers who will be ready to respond to any violence or crimes at protests on Saturday as well.

The “No Kings” day of action happened the same day as, and in opposition to, a Washington, D.C. military parade on President Donald Trump’s birthday. Planning for the parade began two years ago and was intended to commemorate the U.S. Army’s 250th anniversary.

No Kings protests come on the heels of protests across the country over federal immigration enforcement raids that began last week and Trump ordering

The Texas DPS closed the Capitol and grounds just before 1 p.m. because of “a credible threat” ahead of the protest at 5 p.m. Saturday in Austin.

Saturday marks the first full day of Marines on duty in Los Angeles, one week after protests against Immigration and Customs Enforcement raids ignited in LA and spread to other cities across the U.S.,