EUGENE, Ore. -

Eugene Police Chief Pete Kerns says he's concerned about threats on Facebook from people who are angered by a plan to take blood from suspected impaired drivers who refuse a breath test.

Kerns told The Register-Guard police will be vigilant on Friday night as they carry out a Fourth of July emphasis they call "No Refusal."

Arrested drivers who refuse a breath test will be taken to police headquarters in Eugene where waiting prosecutors can obtain a warrant from an on-call Lane County Circuit Court judge for a mandatory blood draw.

Some people complained on Facebook the forcibly drawing blood tramples on a basic human right. One wrote, "You forcibly take blood from me -- I will forcibly take blood from you."