Security chiefs from Armenia, Belarus, Kazakhstan, Kyrgystan, Tajikistan and Russia on Thursday warned that the US-led attack on Iraq could compromise Washington\'s efforts to win the war on terrorism. \"We learned with great worry of the beginning of military action against Iraq, which has already caused human victims and destruction,\" the security chiefs said in a statement, quoted by Interfax-AVN news agency. They warned that the military actions would have \"grave consequences for the entire international security system, including for the unfinished anti-terrorist operation in Afghanistan.\" The six countries, members of the regional Collective Security Treaty, said they worried that the war would trigger \"a vast humanitarian and ecological catastrophe in the region, which is very close to the member states.\" Russian President Vladimir Putin has issued one of the harshest condemnations of the US-led war on Iraq begun on Thursday, while other ex-Soviet member countries of the Collective Security Treaty were key US allies in anti-terrorism operations launched after the September 11, 2001 attacks, notably providing military bases for US forces. (AFP)