WASHINGTON - A data breach in the Democratic National Committee voter database led to a firing, a lawsuit, and a lot of pointed fingers between the top two Democrats running for president.

The DNC temporarily barred Vermont Senator Bernie Sanders' campaign this week from accessing their massive trove of voter information. The decision came after the DNC said Sanders' staff improperly accessed data complied by campaign rival Hillary Clinton.

Sanders' campaign fired Josh Uretsky, their national data director, as a result of the improper access. The campaign then filed a federal lawsuit against the DNC to regain access to the voter database, which campaign manager Jeff Weaver claimed the committee was improperly keeping them out of.

The lawsuit says the campaign is now "sustaining irreparable injury and financial losses" due to its inability to access the data. Weaver also accused the DNC of "taking our campaign hostage" by keeping them from the data.

Clinton's campaign said Friday night their data was "stolen" by Sanders' people. Campaign manager Robby Mook said  "this was a very egregious breach" and said the staffer's actions may have violated the law.

The breach happened Wednesday due to a glitch in the database, according to NGP VAN who maintains the data for the DNC. Uretsky told CNN he was trying to fully understand how the breach affected the Sanders campaign and was not trying to access the Clinton campaign's data.

Material from the Associated Press was used to compile this report.