Police say a night of drinking was to blame for a fatal accident on the NYS Thruway Thursday.

According to police, 42-year-old Mercedes Cha was returning from a party in the Bronx with her mother, 61-year-old Dilsa Brea when she crashed into the barrier near exit 2 on the Thruway. Brea died as a result of the accident. Police say she was not wearing a seat belt.

Cha was taken to the hospital. Police say she was not injured, however, they discovered a high level of alcohol in her system. Cha is expected to be arraigned in Yonkers Thursday afternoon.