It soon may be tough to find one of Microsoft's Surface tablets, the company said.

The Surface 2 and Surface Pro 2 "are close to selling out," Microsoft's developers account tweeted earlier Friday.

At this time, it's unclear how many tablets Microsoft made and what "close to selling out" actually means. A Microsoft spokesman declined to provide information about how many devices the company built but reiterated that inventory is low at Microsoft stores and at the company's site, with some models shipping later than the slated October 22 release date.

A quick check in the Microsoft Store online shows the higher-end models of Surface 2 and Surface Pro 2 have shipping delays. The 64GB version of the Surface 2 won't ship until October 25, three days after it's available in stores. The 32GB version, however, will ship by October 21. The 256GB and 512GB models of Surface Pro 2, meanwhile, should ship by October 29 while the 64GB and 128GB versions ship by October 21.

Source: CNET