"We told them where our red lines were, including the geographical red lines", Lavrov told Russian state television.
Leading up to the expected strikes, Russian officials had warned that attacks on Syria would result in retaliatory actions by Russia, but Russia didn't mobilize any of its air defense systems during the strike.
Russian President Vladimir Putin is ready to meet his U.S. counterpart Donald Trump following an invitation by the latter, but Moscow is waiting for a detailed proposal, Russian Foreign Minister Sergei Lavrov said on Friday.
Russian Foreign Minister Sergei Lavrov said on Friday that Western military strikes on Syria this month had removed any moral obligation Russia had to withhold the missile systems from its ally Syrian President Bashar al-Assad.
Trump told Putin he would be happy to make a reciprocal visit to Russian Federation, the RIA news agency quoted Lavrov as saying.
Previously, both the White House and the Kremlin had only revealed that Trump had invited Putin to the White House during the same call on March 20. "We took into consideration their argument that this would destabilize the situation, despite the missile systems being a purely defensive system", Lavrov said in an interview to RIA Novosti.
Russia-U.S. relations have sunk to post-Cold War lows over the Ukrainian crisis, the war in Syria and the allegations of Russian meddling in the 2016 U.S. presidential election. The U.S., Britain and other Western allies responded by expelling over 150 Russian diplomats, and Moscow, which has fervently denied the British accusations, responded in kind.
On April 14, the US, France and the United Kingdom carried out coordinated airstrikes against Syria in response to the alleged use of chemical weapons by government forces in the city of Douma in the suburban Damascus region of Eastern Ghouta on April 7.
"I will only remind you once again of the statement made by [Russian] President [Vladimir] Putin after a missile strike was delivered on a sovereign country in violation of the foundations of worldwide law", Peskov told reporters when asked about the growing complexity of the global situation and Russia's relations with other countries in connection with the possible supply of S-300 systems to Syria. Russian Federation condemned the strike on its ally as an "act of aggression".
Russia's daily "Kommersant" newspaper reported earlier on Monday that Russian Federation might start supplying S-300 anti-aircraft missile systems to Syria in the near future.
"Now, we have no moral obligations".
"I'm 100 percent convinced that the military won't allow it", Lavrov said, adding that the Russian and USA presidents also "bear responsibility before the people which elected them for peace and security".