MAKHACHKALA, July 26 (RIA Novosti) - A police car explosion in Dagestan Tuesday wounded six people, a Dagestan Interior Ministry officer said. A UAZ vehicle owned by the Russian Interior Ministry exploded this morning in Khasavyurt, approximately five meters away from the city's police office. Two of the wounded are in intensive care. The officer also said the Aktash power station in the Khasavyurt District was attacked with a grenade launcher. This incident occurred Monday at around midnight.

"One shot was fired from a grenade launcher at the electric substation, and a vat containing three metric tons of lubricant was damaged," the spokesman said. "The electric supply was not interrupted."

On Monday night in the Kayakent District of Dagestan, Izberbash Road Police Chief Kamil Omarov was murdered and Criminal Investigator Arslan Kerimov was wounded.

Omarov and Kerimov were chasing a black Zhiguli car on the Kavkaz federal highway. On being ordered to stop, two unknown people got out of the car and opened fire on the police officers.

In the Tsumadin District, Dagestan Interior Ministry officers discovered a large weapons cache belonging to militants.

"The cache consisted of 123 122mm artillery shells and 130 detonators," the spokesman said. "The stockpile was destroyed by military specialists."

An explosive device, with power equivalent to 10 kg of TNT, was found on the Makhachkala-Krasnoarmeysk highway 100 meters from a bridge. "If the criminals had managed to activate this, there would have been more casualties," he said.

The radio-controlled, homemade explosive device consisted of a 10-liter metal bucket stuffed with a mixture of aluminum powder, ammonium nitrate, and pieces of metal, sealed with polyurethane foam and resin, with wires leading out of it.