President Vladimir Putin warned western governments Wednesday not to "cross the red line" in respect to Russia's security interests.

The warning came during Putin's yearly state-of-the-nation address. He directed strong words at critics who are concerned about Russia's recent build-up of troops along its border with Ukraine.

The United States and its allies have urged Russia to pull the troops back. In recent weeks, tensions between Russia and Ukraine have increased as both countries violated ceasefire agreements.

While saying he did not want to "burn bridges" in the international community, Putin did say he would defend his country's interests. He said Russia's answer to outside threats would be "quick and tough."

He did not define where the "red line" would be on a number of issues, but said "we will determine where it is ... in each case."

Putin said no foreign country should be able to tell Russia what it can do on its own land, and that includes increasing the number of soldiers on its border with Ukraine.

Without naming a specific country, he also criticized "unlawful, politically motivated economic sanctions" against Russia.

He was speaking about economic restrictions placed last week on Russia by U.S. President Joe Biden's administration. The action came after U.S. officials accused Russia of attempting to influence the 2020 election and hacking into U.S. computer systems. The U.S. also sent 10 Russian diplomats home, investigated a number of Russian companies and restricted the country's ability to borrow money.

Putin has denied the U.S. accusations. In response, Russia put its own penalties on the U.S., including sending 10 diplomats home and restricting the way the U.S. Embassy can operate in Russia.

In his speech, Putin also said he would direct his country to continue to modernize its military. That includes buying and developing missiles and weapons. He said work continues on an underwater unmanned vehicle that can carry nuclear weapons and also a nuclear-powered missile.

He asked other nations to recognize that Russia has its own interests and "will always find a way to defend its position." He warned other countries not to use "selfish and arrogant" language when speaking about Russia.

Putin questioned why Western governments were quick to criticize Russia but did not speak out against a failed attempt to assassinate Alexander Lukashenko, a Russian ally and the president of Belarus. He condemned political interference by foreign governments in other countries as well, saying it "goes over the top and crosses all boundaries."

While Putin targeted his critics, he also praised his country's progress in the last year. He noted Russia's fast development of vaccines against COVID-19 and put forward economic plans aimed at helping the country recover from the pandemic. He urged more Russians to get vaccinated so the country could reach herd immunity faster.

As Putin spoke, protests supporting imprisoned opposition leader Alexei Navalny happened in Moscow and across Russia's far east. Police arrested several of Navalny's supporters in Moscow and many other protesters were detained across Russia.

I'm Dan Friedell.

Vladimir Isachenkov wrote this story for the Associated Press. Dan Friedell adapted it for Learning English. Bryan Lynn was the editor.