what is supplemental petition information exists ?

[vs0404]

Hi,

I went for H1B stamping interview on 16th of November in South Korea US embassy in Seoul.

And the counselor has taken my passport but i did not get my passport even for a week time.

So when i again went to US embassy in Seoul, they said that they have requested for some information to US counselor about the clause as "supplemental petitioner Information exists".

Can any one help me to understand what is this and how to proceed further.

Thanks in advance.