国际英语新闻：Caucasian separatists threaten to conduct new terror attacks in Russia

MOSCOW, Feb. 7 (Xinhua) -- Chechen separatists warlord Doku Umarov has threatened to conduct new terror attacks in Russia, Moscow's RBC Daily reported on Monday.

In a video clip on the Internet, Umarov said his militants would conduct attacks in Russia "weekly or monthly".

Along with Umarov, the video showed two militants, whom Umarov said were in charge of training about 50 to 60 suicide bombers.

Local media reports said the video clip did not mark the data, which may help to verify when the announcement was made.

Earlier, the President of Russian republic of Ingushetia Yunusbek Yevkurov said Umarov could be the mastermind behind the suicide bombing in Moscow's Domodedovo airport.

So far, no group has claimed responsibility for the attack which has claimed the lives of 36 people.

In March 2010, Umarov claimed responsibility for the twin deadly blasts in Moscow subway, which killed at least 37 people and injuring some 65 others.