DS 5335 under 221(g)

At the time of interview VISA officer told me ‘your VISA is approved’ and took my passport.

On the same day few minutes after the interview I got this email. On the very next day my passport returned with white page and no tick box only case number written.

Dear Applicant:

Thank you for attending your interview at the U.S. Consulate in Hyderabad. This is to inform you that you have been found ineligible for a nonimmigrant visa under Section 221(g) of the U.S. Immigration and Nationality Act.

Please complete the below attached questionnaire and send it to HydADMIN@state.gov at the earliest. Your passport and case numbers are both in the subject line of this e-mail. You must include your passport number and case number in the subject line of all e-mails.

Do NOT send repeated e-mails to this address requesting or offering further information. We will confirm receipt of your questionnaire but will not respond to further messages sent to this address.

Sincerely,

Nonimmigrant Visa Unit

Consular Section

U.S. Consulate General

Hyderabad, India

Email: HydADMIN@state.gov

Attached Questionnaire below:

U.S. Department of State

Form DS-5535

No documents were asked, how long will it take for processing DS 5535. Anybody has experienced