Note: Ellen Nakashima, Chinese Government Has Arrested Hackers It Says Breached OPM Database. Washington Post, Dec 3, 2015. https://www.washingtonpost.com/w ... 65c809eb_story.html
("The identities of the suspects — and whether they have any connection to the Chinese government — remain unclear")
There is no need to read the rest of the Washington Post report, because a lot of the development is not known.