MEMPHIS, Tenn. (AP) — Democrats in Tennessee's largest county and the local NAACP are suing to try to open more early voting sites.

According to The Commercial Appeal , the Shelby County Democratic Party and the Memphis NAACP sued the Shelby County Election Commission in separate chancery court lawsuits Friday.

They argue having only three sites during the first four days of early voting disenfranchises voters in inner-city Memphis, where many rely on public transportation.

They aim to open all 21 early voting sites from primary elections earlier this year. Commission staffers say that's impossible on short notice with personnel shortages.

Officials changed initial plans to open just one site for the first few days after Democrats accused them of trying to suppress black votes.

Early voting lasts July 13-28.

Court hearings are scheduled Monday.

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Information from: The Commercial Appeal, http://www.commercialappeal.com