Nassau police and fire departments received numerous calls Friday afternoon about a pungent odor on the South Shore, the source of which has not been pinpointed, officials said.

The smell does not appear to be natural gas, and may be caused by a garbage barge or sewage treatment plant, officials said.

The county's Office of Emergency Management said in a Facebook post that "when the odor is this widespread, it may be stemming from an offshore issue."

Fire departments that received calls about the smell between about 4 p.m. and 4:30 p.m. included, Long Beach, Point Lookout, Freeport, Merrick, North Merrick, Baldwin and Levittown.

By 5:30 p.m., county fire control said the smell seemed to have moved toward the north.

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