It is a harsh reality of Twitter -- as many people, from celebrities to politicians, know -- that what you post on the platform can stir up controversy.
This weekend, a Facebook executive found that out firsthand.
Last Friday, Special Counsel Robert Mueller released an indictment of Russian agents for allegedly interfering with the 2016 US presidential election.
The 37-page document called out the Internet Research Agency, an infamous Russian troll operation, and also mentioned Facebook more than 30 times by name.
That evening, Rob Goldman, vice president of Facebook ads, tweeted his thoughts on the charges.
Facebook confirmed the apology on Tuesday, but declined to share the text of his message or comment further.