About 25 firefighters from Omarama, Kurow and Twizel rushed to the scene in Broken Hut Road, south of Omarama, after a fire erupted about when a large number of hay bales ignited.
However the Heliventures crew helping battle a two hectare blaze at Omarama were temporarily grounded due to reports of a drone being flown in the area.
A Fire and Emergency New Zealand (Fenz) spokeswoman confirmed the helicopters were grounded for a short period following reports of a drone near the Broken Hut Road property.
The spokeswoman said no drone was able to be located and both helicopters were back operating as normal about 5pm.
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