WASHINGTON (AP) - Justice Dept. appoints former FBI head Robert Mueller to oversee probe into Trump-Russian connection in 2016 election.

Muller led the agency under President George W. Bush and President Barack Obama.

The appointment Wednesday comes amid a growing Democratic outcry for someone outside the Justice Department to handle the politically charged investigation.

It follows the revelation Tuesday that fired FBI Director James Comey wrote in a memo that Trump had asked him to end an investigation into former national security adviser Michael Flynn.

This story will be updated as more information is released.