"Rather than trying to impose some semblance of discipline and accountability over the agents they've deployed, the President and current administration officials seem eager to escalate the situation, while offering public explanations for the shootings of Mr. [Alex] Pretti and Renee Good that aren't informed by any serious investigation " and that appear to be directly contradicted by video evidence," the Obamas wrote.

They called on "every American" to support and draw inspiration from the wave of peaceful protests in Minneapolis and other U.S. cities.

"They are a timely reminder that ultimately it's up to each of us as citizens to speak out against injustice, protect our basic freedoms, and hold our government accountable," Obamas said."