More than 1,500 Texas state troopers were sent Saturday to various cities by Gov. Greg Abbott to help control protests over the death of Houston native George Floyd in Minneapolis police custody.

In Houston, Police Chief Art Acevedo said nearly 200 people were arrested Friday during a protest in which many blocked an Interstate 45 ramp and a highway.

“Most will be charged with obstructing a roadway,”

Protesters also blocked a Dallas interstate and one officer suffered non-life-threatening injuries, police said on Twitter.

Dallas Police Chief Renee Hall said officers were making sure the protest was peaceful when violence began.

On Friday, the white Minneapolis police officer who knelt on Floyd’s neck was arrested and charged with murder.