(CNN)The Bernie Sanders campaign staffer who was fired for accessing data unique to the Hillary Clinton campaign's vote file, told CNN on Friday that he was only trying to "understand how badly the Sanders campaign's data was exposed" and not attempting to take data from the Clinton campaign.

"We knew there was a security breach in the data, and we were just trying to understand it and what was happening," said Josh Uretsky, reached by phone on Friday morning, a day after the campaign let him go.

He added, "To the best of my knowledge, nobody took anything that would have given the (Sanders) campaign any benefit."

The Democratic National Committee suspended Sanders' presidential campaign from accessing its voter database after it alleged the campaign took advantage of a software error to access Hillary Clinton's confidential voter information.