Apple has pushed back the launch of its iPad tablet PC in international markets by a month due to overwhelming demand in the U.S., media reported on Thursday. Bloomberg news said that Apple sold "more than 500,000 of the devices in a week" and underestimated "how quickly they would sell in the U.S."

Demand for iPads in the U.S. is expected to surpass supply for several more weeks. Apple had planned to launch the device in Australia, Canada, France, Germany, Japan and the U.K. from the end of April.

However, experts believe the delay will not harm the iPads' overseas sales. Charlie Wolf, an analyst at Needham & Co. in New York, said Apple will easily sell 1.25 million iPads by the end of the second quarter. "People are not going to go out and buy a competing product because there's no competing product," Wolf said.

Meanwhile, sales of the device which had been going on in some online markets in Korea were halted Wednesday over legal concerns. According to the Korea Communications Commission, the iPad is considered a personal computer and as such must be tested and registered for compliance with safety regulations before it can be sold here.