MOSCOW - A Chechen militant leader has claimed responsibility for twin suicide bombings on Moscow’s subway that killed 39 and wounded scores of others.

Doku Umarov, who leads Islamic militants in Chechnya and nearby regions of Russia’s North Caucasus, says in a statement posted on a pro-rebel Web site that the attacks were an act of revenge for the killing of civilians by Russian security forces.

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Umarov’s statement posted Wednesday said the attacks on Russian cities will continue.

Russian authorities have said that the bombings, the first terror attacks in Moscow in six years, were carried out by militants from North Caucasus.