IGN are reporting that Microsoft have announced their E3 press conference.
It starts at 12:30 Eastern / 09:30 Pacific / 17.30 UK BST (GMT+1), will last 90 minutes and will be streamed online. Among others things Microsoft are promising: "everything from in-depth looks at previously announced games to trailers for our unannounced games coming in 2014 and beyond."
It looks like there will be another events pre and post E3 conference.