PHOENIX - Phoenix mayor Greg Stanton wrote an open letter to United States attorney general Loretta Lynch requesting an investigation into Tuesday's issues for Arizona voters in the presidential preference election.

"This is unacceptable anywhere in the United States, and I am angry that County elections officials allowed it to happen in my city," he wrote.

Critics have largely placed blame on Maricopa County recorder Helen Purcell.

READ: Mayor Greg Stanton's full letter to U.S. Attorney General Loretta Lynch

Stanton's strongly worded letter highlighted the decrease in the number of polling locations, noting that the 60 locations available to voters Tuesday were 70 and 85 percent fewer than those available in 2012 and 2008, respectively.

It also said that the county "distributed fewer polling locations to parts of the county with higher minority populations."

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Stanton's letter said that his request "comes on the heels of consistent activity that has created a culture of voter disenfranchisement in this state," citing various numbers showing how many Arizona ballots have been discarded in recent elections.

Stanton is not the first public official to express his frustration with the way Tuesday's voting went -- Arizona governor Doug Ducey called the situation "unacceptable."