TOPEKA, Kan. (AP) — A deadline is near for those who believe they were victims of a 2016 toxic gas release over Atchison.

Federal prosecutors are urging victims to submit written victim statements by Friday.

U.S. Attorney Stephen McAllister, said in a news release, sentencing of Harcros Chemicals, Inc., and MGP Ingredients Inc., is May 27.

Both companies pleaded guilty to violating the federal law and each agreed to pay a $1 million fine.

In October 2016, two chemicals were mistakenly mixed to form a cloud of chlorine gas over Atchison.