WASHINGTON, May 31 (Reuters) - U.S. officials are "pursing many avenues of possible contamination" that may have led to the discovery of unapproved genetically modified wheat in an Oregon field, a top official with the Department of Agriculture's Animal and Plant Health Inspection Service (APHIS) said on Friday.
"At this point we have not ... eliminated any" causes, APHIS' Bernadette Juarez told Reuters in a telephone interview. "How it got there is exactly what we are investigating right now."
Juarez said there is no timeline to finalize the investigation beyond "as quickly as possible." (Reporting by Charles Abbott, writing by Ros Krasny; Editing by Gerald E. McCormick)
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