The number of victims to terrorist attacks on Ingushetia (North Caucasus republic neighbouring Chechnya) may grow further.
"The casualty toll may grow considerably from what has been reported," a senior Interior Ministry officer told RIA Novosti on condition of anonymity.
Militants hid the corpses of the duty officers they killed at check points and car drivers on the Kavkaz highway not to make police suspicious ahead of time.
Latest reports said 47 law enforcers were killed in the terrorist attacks on Ingushetia. The civilian casualty toll is being specified.
Six persons were killed in attacks on Ingushetia's facilities, 8 border-guards were injured, according to the press service of the North Caucasus frontier department of the Federal Security Service (FSB).
Late on Monday night, several militant groups attacked the Ingush Interior Ministry building, frontier unit 137 in Nazran, and the villages of Krabulak and Sleptsovskaya.