Outcry from privacy advocates prompted county supervisors to postpone or possibly scrap plans to purchase a surveillance drone for the Alameda County (Calif.) Sheriff's Office .

Last minute intervention Tuesday morning by the American Civil Liberties Union prompted supervisors to require explicit authorization to use grant money the Sheriff's Office received to purchase the drone. Now the proposal will have to go to the public protection committee for approval then back to the full board of supervisors. That is likely to happen early next year.

Concern has been mounting among privacy groups for months that Sheriff Greg Ahern was forging ahead without rules for deploying a drone in the skies above Alameda County.

The ACLU and Electronic Frontier Foundation are concerned about the lack of privacy protections. They were dismayed to find that the Sheriff's Office was asking the supervisors on Tuesday to approve a $31,646 grant to help pay for a drone, indicating that the department was far closer to acquisition than they had led the public to believe.

Read the full Oakland Tribune story.