Ukraine appeared mired in a political standoff Tuesday, as massive protest rallies showed no sign of letting up and the government warned of its capability for force after a failed attempt to take it down.

The opposition lost its attempt to topple the government by parliamentary means when a vote of no-confidence failed by a sizeable margin.

President Viktor Yanukovych left on an official visit to China, where he is expected to sign an array of economic agreements, his office said. He is expected to be gone until Friday and the prospects for a definitive development in the next few days seem small.

Protest leaders vowed to continue their demonstrations, which have brought as many as 300,000 people to the streets of Kiev, in the largest outpouring of public anger since the 2004 Orange Revolution.

Soon after Tuesday's vote, about 5,000 protesters gathered outside the presidential administration building, then moved to the capital's central Independence Square, where the crowd grew to more than 10,000, according to police estimates.

The opposition called for the parliamentary vote over Yanukovych's shelving of a long-anticipated agreement to deepen political and economic ties with the European Union and the violent tactics used by police to disperse demonstrators protesting the decision.

Yanukovych has sought to quell public anger by moving to renew talks with Brussels. The government appears to recognize that the police violence may have galvanized long-brewing frustrations rather than stifle protests.

But while Prime Minister Mykola Azarov, attending the parliamentary session with his cabinet, apologized for the violence, he also made a tough vow.

“We have extended our hand to you, but if we encounter a fist, I will be frank, we have enough force,” he said.

There is a question as to how long protesters' determination will last as winter sets in and the holiday period approaches, noted Adrian Karatnycky, a Ukraine analyst at the Atlantic Council think tank.

In addition to Yanukovych's trip to China, “these things suggest Yanukovych is playing for time,” he said.

The no-confidence measure got the support of 186 members of the Verkhovna Rada, 40 shy of the majority needed. Even if it had passed, Yanukovych would have remained president, but the prime minister and cabinet would have been ejected.

In turn, Vitali Klitschko, the super heavyweight world boxing champion and leader of the opposition party Udar, vowed that the action would continue.

“We will peacefully blockade the government building and not allow them to work,” he told demonstrators at Independence Square after the no-confidence motion failed.

Oleg Tyahnybok, leader of the nationalist Svoboda party, accused Russia of having “an interest in a situation where more and more blood flows in Ukraine. The president should accept our conditions for preventing this scenario _ he should resign and call elections for all branches of power.”

Russia wants to turn Ukraine toward its orbit and away from the EU. Azarov, like Yanukovych, has said Ukraine wants further integration with the EU, but wants to negotiate better terms and can't bear the burden of the trade losses with Russia it would presumably suffer.

EU leaders have reaffirmed their willingness to sign the association agreement.

Ukraine is also deeply dependent on natural gas from Russia, which previously has sharply raised prices for its neighbor.

Russia opposes closer Ukraine-EU relations, hoping to draw Ukraine into a trading bloc of several former Soviet republics. But Karatnycky said the size and vehemence of the protests effective derails Russia's desire, saying joining that bloc “would trigger a further escalation.”

In Brussels at a meeting of foreign ministers from NATO member states, U.S. Secretary of State John Kerry said Europe and its allies have “all declined to engage in a rather overt and we think inappropriate bidding war.”

Lawmakers in Poland, a country at the forefront of EU attempts to bring Ukraine into the 28-nation bloc's fold, adopted a resolution calling for dialogue between Ukraine's opposition and the government. It also condemned the use of force during protests and expressed solidarity with pro-European Ukrainians. (AP)