OUTSIDE TSKHINVALI, Georgia Russia and small, U.S.-allied Georgia headed toward a wider war Saturday as Russian tanks rumbled into the contested province of South Ossetia and Russian aircraft bombed a Georgian town, escalating a conflict that already has left hundreds dead.

Watch filled volume video:

Georgia’s Foreign Ministry said the country was “in a explain of war” and accused Russia of beginning a “massive military aggression.” The Georgian parliament approved a state of martial ordinance, mobilizing reservists and ordering regulation authorities to work round-the-clock.

Russian President Dmitry Medvedev said that Moscow sent troops into South Ossetia to force Georgia into a cease-fire and prevent Georgia from retaking control of its breakaway region rear it launched a major offensive there overnight Friday.

In a meeting with refugees, Prime Minister Vladimir Putin characterized Georgia’s actions as “consummate genocide,” according to his office’s Web site. Putin also said Georgia had effectively lost the right to rule the breakaway province - an indication Moscow could exist preparing to fulfill South Ossetians’ wish to be absorbed into Russia.

The risk of the conflict setting off a wider war in like manner increased Saturday when Russian-supported separatists in another breakaway region, Abkhazia, also targeted Georgian military force by launching air and artillery strikes to drive them out.

President Bush called for any end to the Russian bombings and an instant halt to the violence.

“The attacks are occurring in regions of Georgia very much from the zone of conflict in South Ossetia. They mark a dangerous escalation in the crisis,” Bush said in a statement to reporters while attending the Olympic Games in Beijing.

Georgia President Mikhail Saakashvili called it an “unprovoked brutal Russian invasion.”

“This is about annihilation of a representative government upon their borders,” Saakashvili told the British Broadcasting Corp. “We on our confess cannot fight with Russia. We want immediate cease-fire, immediate pause of warfare, decomposition of Russia and Georgia and international mediation.”

At a interview of the U.N. Security Council Saturday, the third part in three days on the issue, Russia refused to agree to a cease-fire or a diplomatic agreement. The stir ensured that the fighting with Georgia would keep spilling into other regions such as Abkhazia’s Kodori Ridge, where 15 U.N. military observers were told to evacuate.

“A ceasefire would not be a solution. The fighting is mute going on. The Georgian forces are continuing to be on the South Ossetian territory,” Russian Ambassador Vitaly Churkin declared.

U.N. Secretary-General Ban Ki-moon urged “completely parties to without put off end hostilities and to engage, without delay, in negotiations to achieve a peaceful colony,” his office related in a statement late Saturday.