It's a scam, read that: https://bitcointalk.org/index.php?topic=5238319.60

They are buying time, and probably are running a fractional reserve. (Funds hacked? Exit scam? Bad investment?)
Everyone has their funds locked, and they reply the same thing (suspect activity) then nothing.

I twitted about their activity, and they blocked me on twitter.

https://twitter.com/anth0mk/status/1255923160643403776

https://i.imgur.com/V5MBUy5.jpg

Contact your authorities department.

https://www.fbi.gov/tips
https://complaint.ic3.gov/default.aspx?