Pictures showing the new Nokia Windows Phone 8 mobile handsets have reportedly been leaked on Twitter.

Pictures, apparently showing the new Nokia Lumia 920 and 820 handsets, were released on Twitter on an account called @evleaks. The pictures show the handsets, which look similar to Nokia's earlier Lumia models, in a range of colours, including yellow and red.

The same account was used last week to leak images apparently showing new HTC devices, the Telegraph reports.

According to the paper, the larger of the two, the Lumia 920, has a 4.5-inch display and the smaller Lumia 820 has a 4.3-inch display but comes in more colours.

Nokia and Microsoft are holding a joint event in New York on Wednesday, at which they are expected to announce the new Windows Phone 8 handsets.