A crash has blocked traffic on the I-6 road between Karnobat and Aytos, Road Infrastructure Agency says. It happened about two kilometres before the Polyanovo junction.
Police at the scene are letting cars through in turns while they make the road safe. There's no word yet on how many vehicles were involved or whether anyone was hurt.
The stretch is normally busy, and the restriction near Polyanovo could cause traffic jams. Police are directing drivers depending on conditions, but no detour has been announced yet.
The Road Infrastructure Agency is asking drivers to slow down and follow police signals because of the temporary setup. Police will say what caused the crash once they finish their initial check. It's still not clear when the road will fully reopen.