New Delhi (CNN) India's decades-long Maoist insurgency has claimed more lives in what Prime Minister Narendra Modi denounced as a "cowardly attack." At least 25 police officers were killed and six others injured Monday when hundreds of suspected Maoist rebels attacked a convoy in central India, officials told CNN. At least 24 police officers were killed and seven others were injured when around 500 suspected Maoist rebels attacked a police convoy. In March, 12 officers died in a suspected Maoist attack on another convoy in the same district. Former Indian Prime Minister Manmohan Singh once described Maoist rebels -- who are well organized and trained -- as the country's "gravest internal security threat."

Source: CNN April 25, 2017 03:43 UTC