Three more elephants have died in the Bandhavgarh Tiger Reserve (BTR) in Madhya Pradesh's Umaria district, taking the toll to seven, while the condition of three other tuskers was serious, a forest official said on Wednesday.

Madhya Pradesh's Forest Minister Ramniwas Rawat has ordered a probe by a Special Investigation Team (SIT) into the death of the tuskers and asked officials to ensure strict action against culprits.