An explosion killed at least six policemen and wounded another 14 people on Wednesday in Dagestan
A booby-trapped car exploded near the traffic police headquarters in Makhachkala, the Dagestan capital, the official said.
"According to preliminary information it was a terrorist attack," he was quoted as saying.
"The police spotted the suspicious car and rammed it from the side after which the explosion took place," the police spokesman said, adding that the policemen who rammed the car were killed in the resulting explosion.
Windows were blown out over 200 metres (650 ft) away by blast, which bomb experts from Russia's domestic intelligence agency, the Federal Security Service, said was equivalent to about 50-60 kg (110-130 lb) of TNT.
A doctor at the local hospital told Reuters on condition of anonymity that the death toll could increase, but declined to give any further details.
Russia imposed its control in Muslim states, however, still low-level insurgency continues in Muslim states controlled by Russia.
Human rights groups have repeatedly accused the authorities of serious abuses including house burning, extra-judicial killings, torture and illegal punishment.
Last Mod: 06 Ocak 2010, 11:03