"Black Widow" back for revenge?

The once-terrifying "Black Widow" seems to be back again, and police were hunting in Russia after them.
"Black Widow" refer to suicide bombers Chechen women whose husbands or brothers were rebels were killed in both wars in Chechnya since 1994. suicide bombers who have lost the will to live, they dive into revenge and becoming.
Another explosion killed two people and wounded another Thursday in the Caucasus region of Dagestan, Russian news agencies reported.
Only a day earlier, two explosions killed 12 people in the town of Kizlyar in Dagestan. Although on Monday, two female suicide bombers killed 39 in attacks in the Moscow subway, and authorities have linked the attacks to militants in the North Caucasus.
The terrorists who hit 39 lives, including their own, the black widows are regarded as typical.
Doku Umarov, leader of Islamic militants in Chechnya and other regions in Russia Caucasusian, said in a video posted on a Web site Monday that two attacks were revenge for the murder of Chechen civilians by Russian security forces, according to the Associated Press.
In his video, Umarov threatened new attacks in Moscow. Russian Federal Security Service said its agents are investigating the possibility that the two women were part of a team of 30 members sent by the terror Umarov, according to USA Today.
In recent years, women dressed in black flew two passenger planes, exploded at a rock concert and attacked a Moscow subway twice. They were among the group of Chechen terrorists died with at least 130 hostages in a theater in Moscow in 2002, USA Today, "he said.
One observer noted that human right to return is a sign that conditions have deteriorated in the North Caucasus.