A massive blaze has swept through US apparel giant Gap Inc's Fishkill distribution centre in New York City.

According to local media reports, the 990,000 sq ft warehouse caught fire on Monday (29 August) with firefighters continuing to tackle the flames into Tuesday morning.

The report  in The Poughkeepsie Journal claims despite the centre suffering "significant damage", all of the 100 employers who were on the site at the time are safe and accounted for.

The cause of the fire is now being investigated by federal, state and local investigators, while questions remain about what will happen to the 600 employees at the now closed facility.

The company did not respond to just-style when asked for comment.

Gap recently posted a fall in sales in its second-quarter, with US revenue declines worse than last year, weighed down by a heavy fall in sales at its Banana Republic brand. 

Foreign currency fluctuations negatively impacted earnings for the US speciality clothing retailer in the three months to the end of July, which slumped to US$125m from $219m a year earlier. 

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