During this year’s AnimeJapan 2017 event, it was revealed that the upcoming second season of the anime adaptation of Yasuhiro Nightow’s Kekkai Sensen (Blood Blockade Battlefront) manga is slated to air this October during the Fall 2017 anime season. It will premiere on MBS, Tokyo MX, and BS11. It is scheduled to have 12 episodes.
Here is the announcement video for the upcoming second season: