A Romanian truck driver was detained after a mass accident on the highway in Bulgaria.

A Romanian truck driver was detained in Bulgaria following a massive accident on the highway, suspected of causing the initial collision. Authorities are seeking additional expert opinions regarding the truck's role in the incident. The driver was interrogated and will undergo another questioning with an interpreter. Bulgarian officials have interviewed 44 witnesses, with the Romanian driver being the only one arrested. Visibility suddenly decreased on the highway, and the truck was likely moving very slowly. Traffic was resumed on the A1 highway after the accidents, which involved 86 vehicles, resulting in 12 fatalities and over 50 injuries. November 11 has been declared a national day of mourning in Bulgaria.