Moscow, Jan 27 (Jagran News Network): The attack on the city’s Domodedovo International Airport took place despite warnings issued last month by the Russian security services that the suicide bombers were trained by the al-Qaeda in Pakistan, claimed media report.

The attack, which killed 30 people and hurt 180, was part of a suicide squad. The Moscow Police that showed laxity despite warnings are now on their toes to find the three accomplices, who supervised from a distance.

The Kommersant, a Russian newspaper, has published a memo from the Russian security services to Moscow police warning that terrorists who had been trained in Pakistan planned to launch attacks in the Russian capital.

According to other media reports, the team had spent time in Pakistan and Iran, and one of the women had a relative with a flat in Moscow that might be used as a bomb-making factory.

Another group of five Islamist militants trained in Pakistan was also expected to cross into Russia soon, it added.

Briefing on the matter, security experts said the tip-off had revealed that a criminal gang based in the Moscow suburbs was assisting a Chechen bomb-making squad, and a suicide cell was travelling from the training camp, the report said.

Earlier, Russian security sources claimed that a male and female suicide bomber from the Black Widow brigades had carried out the bombing together.

The region, which includes restive internal Russian republics such as Chechnya, Ingushetia and Dagestan, is in the grip of a growing Islamist insurgency and has served as a launching pad in the past for a series of deadly strikes on civilian targets in Moscow and other cities, it added.

Meanwhile, Russian Prime Minister Vladimir Putin on Wednesday ruled out any links between the Caucasus region of Chechnya and this week's deadly suicide bombing at Domodedovo Airport.

"The preliminary investigation shows that it is not linked to Chechen Republic," said the Russian Prime Minister.

No group has yet claimed responsibility for the attack, which comes less than 12 months after two female suicide bombers from the volatile North Caucasus struck the Moscow metro.