According to PocketNow, an LG employee did not know how to maintain discretion and ended up advancing the news that Google and its partners plan to announce next October 29th.
Amit Gujral, head of mobile devices at LG in India, said in an interview that "Google will introduce the LG Nexus on October 29 and the phone will be available in the Indian market by the end of November".
He further described that the device comes with a 4.7 inch screen, 1.5GHz quad-core processor and confirmed the arrival of Android 4.2. However, the executive does not seem to have confirmed the name "Nexus 4", keeping the surprise for the event.
Recent rumors state that the search engine should also feature a 10-inch tablet, the Nexus 10. Read here.