Under Title VII of the Civil Rights Act of 1964, job requirements must be uniformly and consistently applied to persons of all races and colors. Even if a job requirement is applied consistently, if it is not important for job performance or business needs, the requirement may be found unlawful if it excludes persons of a certain racial group or color significantly more than others. Examples of potentially unlawful practices include:
(1) soliciting applications only from sources in which all or most potential workers are of the same race or color;
(2) requiring applicants to have a certain educational background that is not important for job performance or business needs;
(3) testing applicants for knowledge, skills or abilities that are not important for job performance or business needs.
Similar rules apply to national origin discrimination. A dismissal of all but Indian ethnic employees for no particular reason, combine with rehiring only Indian replacement personnel, strongly suggests unlawful discrimination.
In order for you to have a valid complaint, however, you must have standing, i.e., you must apply for employment and be denied. Until you do, you cannot request an investigation from the Equal Employment Opportunity Commission.
To file a claim, see: http://www.eeoc.gov/charge/overview_charge_filing.html.
Hope this helps.