Google's latest smartphone and the 32GB version of its tablet have sold out in less than an hour of release.

No Nexus 4 devices made by LG or Samsung-made Nexus 10 32GB tablets were available on the Google Play store, which is encouraging people to leave their email addresses so that they can be alerted when stocks are replenished.

"There's been so much interest for the Nexus lineup that we've sold out of some of our initial stock in a few countries," the Google said in a post on its Google+ Web site.

"We are working hard to add more Nexus devices to Google Play in the coming weeks to keep up with the high demand."

The devices were launched weeks afer Apple's new iPhone 5 and iPad Mini hit the shelf, and Microsoft launched its Surface tablet and announced several new smartphones featuring its Windows Phone 8 operating.

It is an intense period of competition between the leading tablet and smartphone manufacturers, and Google's better-than-expected sales suggest that the company is still in the game.

Google has not revealed how many units it has sold, but the low price of its devices could be one of the reasons they've been so popular.

The 8GB and 16GB models of the Nexus 4 cost only $299.99 and $349.99 respectively, without a contract. By comparison, the entry level iPhone 5 costs $649 without a contract.

Both Google's Nexus 4 and Nexus 10 10.1-inch tablet run Android 4.2 Jelly Bean - the latest version of Google's Android operating system.

The Nexus 10 in particular is seen as Google's answer to Apple's iPad 4 and features a 2,560-by-1,600 high-resolution display with 300 pixels per inch. The Nexus 10 is available at $399 for a 16GB model compared to the $540 price tag for a 16GB iPad 4.

Earlier this year, Google similarly sold out of its smaller Nexus 7 tablet, 16GB, on the day of release, but the company was able to stock a few short weeks later.

However, Google is not the only company struggling to meet demand for its smartphone. Apple similarly sold out of its iPhone 5 within an hour of taking pre-orders for the device. It claims to have sold five million handsets in three days.