Foreign Minister Murray McCully is facing more criticism after his office sent instructions telling MPs not to attend an upcoming Falun Gong celebration to avoid upsetting the Chinese government.
The email was mistakenly sent to all Members of Parliament, instead of just National MPs.
Labour's foreign affairs spokesman David Shearer has been joined this morning by Greens MP Kennedy Graham in criticising McCully's office.
"I have a fundamental problem with the executive branch of Government ... presuming to advise members of the national legislature what to do," Mr Graham said on Newstalk ZB.
In the email, Mr McCully's office noted that May 13 was World Falun Dafa Day and the office was aware of at least two celebrations for which MPs could receive invites.