Twelve serious road crashes in Bulgaria in the past 24 hours left 20 people injured, the Interior Ministry said on its website. No one died.
Sofia had three serious and 13 minor crashes, in which four people were hurt.
So far this month, 521 serious crashes have killed 40 people and injured 643.
Since the start of the year, police have recorded 5,683 serious crashes. They killed 405 people and injured 7,045.