High-priority alert based on source significance and keyword relevance.
Context
What happened: A bus carrying 46 passengers crashed into a tree near Semarmathani turn in Chhattisgarh while heading to Kelhari village from Manendragarh, according to Superintendent of Police Ratna Singh.
Key numbers: 6 killed, 40 injured, 46 passengers on board; accident occurred shortly after noon.
Why it matters: The crash caused multiple casualties and injuries, with the incident reported by the Superintendent of Police.