(CNN) -- A dairy plant fire in Portage caused butter to run out of the building Monday night, according to the Portage Fire Department.

In a news release, Fire Chief Troy Haase said crews were called to Associated Milk Producers, Inc. at about 9:15 p.m. for a report of smoke and fire at the commercial concrete building.

Chief Haase said crews had a hard time getting into the building because of heat, smoke and butter runoff.

The fire started in a room where butter was stored and as it heated, it began to flow through the structure.

Chief Haase said the Portage Hazmat Team was called in to help contain the runoff into storm sewers and into the canal.

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