A Victorian federal Labor MP whose electorate office was used for a sting operation to incriminate alleged branch stacker Adem Somyurek says he will co-operate with authorities as the federal government weighed in, calling it a matter of "serious concern''.

Anthony Byrne, whose office had a secret camera installed to record a conversation with Mr Somyurek, was not present at the time and said there was a lot of misinformation about his role.