The world's top cellphone maker, Nokia, is working on its own Internet tablet, scheduled to reach stores later this year, a technology sector analyst said on Tuesday.

Over the weekend, rival Apple Inc sold more than 300,000 iPads on the tablet computer's first day in stores, a strong showing that roughly matched Wall Street forecasts and mirrored the iPhone's debut in 2007.

Right now the supply chain is being primed up for a fall release. It has to be on the shelf by September-October to meet demand for the holiday window, said Ashok Kumar, analyst with Rodman and Renshaw.

A spokesman for Nokia declined to comment.

(Reporting by Jim Finkle in Boston and Tarmo Virki in Helsinki; editing by Simon Jessop)

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