From gamasutra.com:

The story continues, with more details.

Electronic Arts did, in fact, verify that it received a correspondence from competitors in Montreal similar to the one obtained by Gamasutra. But the company declined to provide any further details, neither to show us the correspondence nor to confirm the company or individual that sent it.
When approached [...]

From gamereactor.eu (via kotaku.com):
 
The first screens and info from Deus Ex 3 have been released. It is under development at the new Eidos Montreal studios.
The game takes place in the year 2027 and the main character Adam Jensen is a security guard at a biotech company called Sarif. One day the offices are stormed [...]

From maxconsole.net:

Just a rumor so far, so take this with a grain of salt.
A former mid-level manager (of whom we do not previously know) has got in touch with us to potentially expose what is a very disturbing alleged occurrence in the games industry. On the condition of anonymity, he has revealed attempts of Montreal [...]

Technorati Tags: eidos,montreal,thief,deus ex
From play.tm:

“Eidos Montreal may have already confirmed they are working on Deus Ex 3, but there’s been a lot of conjecture surrounding the studio’s second project – which has been rumoured in the past to be Thief
4.
A job ad for the studio earlier this year hinted at the identity [...]

Technorati Tags: eidos,montreal

From Gamasutra.com: "Stéphane D’Astous, General Manager of the newly-formed Eidos Montreal, is bullish about his studio’s planned development cycle. "Trying to get nine women to give birth to a baby in one month doesn’t work. Everyone has tried that in this industry, but we decided to cut the [...]

Technorati Tags: news,montreal,eidos

From developmag.com:
"On Monday Eidos officially opened its new Montreal studio, welcoming Canadian business and industry trade press to tour the facility. Devel
op was on hand to talk to studio head Stephane D’Astous about the building of the new studio, its first project Deus Ex 3 and plans for the future…"
Read more…