One of the hackers, who goes by the pseudonym “E,” told the Daily Dot that the cyberattack was politically motivated.

“Trying to mold an atrocious monstrosity into socially acceptable behaviors is repulsive,” said E. “Obviously what [Planned Parenthood] does is a very ominous practice. It’ll be interesting to see what surfaces when [Planned Parenthood] is stripped naked and exposed to the public.”

Planned Parenthood Chief Information Officer Tom Subak told the Daily Dot on Sunday night that the organization was previously unaware of a breach in their systems.

“We think we have really good security, especially on flagging suspicious behavior,” said Subak. “We have not [received any flags].”