Appelbaum had earlier written on his Twitter feed that his account information had been subpoenaed by the U.S. government and warned his followers not to write him private messages on Twitter for fear that they too could be later read by Justice department prosecutors. Jonsdottir was among the WikiLeaks volunteers who received letters from Twitter informing them of U.S. subpoenas.
A lawyer for Julian Assange, Mark Stephens, told Bloomberg News that the Justice Department also requested user information about Assange, Appelbaum, Jonsdottir and two other activists from Google, Facebook and Skype.
Via Twitter, Appelbaum said that he thought that making his versions of Monday's events public might make matters worse for him, but said, "I refuse to be silent about state-sponsored ... harassment."
He also said he expecting to be meeting with CBP agents at SeaTac again soon. "I'm flying to Toronto, Canada for work on Sunday, and back through Seattle again a few days later," he tweeted. "Should be a joy to meet these guys again."