WASHINGTON (CNN) — While not directly calling the crisis in Darfur a genocide, the U.S. State Department has said that interviews with Sudanese refugees indicated attacks against the regions’ black Africans appeared to be racially motivated.

State Department spokesman Richard Boucher said Washington was assessing its interviews of more than 1,100 Darfur refugees in Chad.

A report of those interviews, currently being compiled by the State Department, will be a major factor in determining whether genocide occurred.

The interviews with the refugees about their experience, Boucher said, were conducted in a “systematic way” to determine whether the atrocities against Darfur’s black Africans were racially motivated.

Officials have said the project, in essence, was a genocide investigation.

Boucher said information from the interviews “coincides with the pattern that we have seen that government forces, Janjaweed militias, Arab groups — there’s a pattern of attacks against non-Arab populations.”