YES! Bihar m.b.b.s first-round counselling have been cancelled. what's the reason behind it is still not known even to media. NEW dates have been published on BCECE Oficial site...where you can gather other information.

ALL THE BEST!

Hey Sushil! Bihar NEET 2019 Seat Allotment has been released. The counselling is being conducted by the BCECE Board. The counselling is conducted for admission into MBBS/BDS courses as per the rank list of NEET 2019 against state quota seats. The admission procedure for the 85% quota seats is conducted by the name of UGMAC (Under Graduate Medical Admission Counselling). 85% state quota seats counselling will be done for various medical and dental colleges/universities within the state. Last Date of online Registration for seat allotment, Choice filling & Choice locking was 7th July.

You can go to the website for more knowledge 

https://medicine.careers360.com/articles/bihar-mbbs-counselling