Already tried every door I saw several times, but after your reply, tried every crack in the wall, door like holes, structures, red areas, even regular walls for any possible missed areas...
But I give up before I go completely crazy after three hours frustration. Thanks for the reply.
You need to have Red Kira unlocked for these elements to appear I believe. Which means, progressing the story to the point were you get mugged by the homeless guy in front of the library during the main quest.