Chubais also said, "I will redouble my efforts in reforming the national economy and uniting democratic forces."
An inquiry has been launched into the incident pursuant to the article on "committing an attempt on the life of two or more people," a spokeswoman for the Moscow regional prosecutor's office has told RIA Novosti.
A RIA Novosti correspondent reports from the site that the explosion has left a crater of 5-7 meters in diameter and about 1.5 meters deep. Used bullets of the 7.62-mm caliber for a Kalashnikov have also been found.
The explosion damaged a few passing cars.
According to initial reports, the incident was witnessed by logging workers.
The Vulkan-5 operational plan has been launched in seven districts of the Moscow region, the municipal interior affairs department of the Moscow region has told RIA Novosti.
Vladimir Vasilyev, the head of the State Duma committee for security and former interior minister, has described the armed assault of Chubais' cortege as blatant and outrageous.
Vasilyev denied outright the version of a staged attack. "The attempt was so outrageous that it could have hardly been staged," the parliamentarian said.
