The Justice Department is debating what to do about messages it would like to obtain from the encrypted messaging application WhatsApp, according to a report published Saturday.

The application, which was purchased by Facebook in 2014, is most commonly used to exchange messages overseas. It also provides end-to-end encryption for those messages. According to sources quoted by the New York Times on Saturday, that level of security has prevented law enforcement officials from accessing content relevant to an investigation despite a wiretap order approved by a federal judge.