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UPPER MARLBORO, Md. (WUSA9) - Firefighters are trying to control a large mulch fire that is spreading in Upper Marlboro, Md., officials said.

Prince George's Fire Department tweeted, "Several engine companies, water tankers and foam units have been requested."

PHOTOS:Large mulch fire burns in Maryland

Additional resources were being called to the scene including brush units and foam units. No structures are in danger at this time, officials said.

Currently, the shifting winds are complicating the process to put out the fire. Water supply is also been noted as an issue and four additional tankers are being requested, officials said.