The U.S. official made the comment a day after Washington withdrew from the Intermediate-range Nuclear Forces Treaty, a Cold War-era pact signed in 1987 that banned land-based missiles with a range of between 310 and 3,400 miles (500-5,500 km). Washington on many occasions had accused Russian Federation of violating the accord, but Moscow vehemently dismissed all accusations and, in its turn, expressed grievances over Washington's non-compliance.
Putin on Monday accused the United States of "seriously complicating the situation in the world and creating fundamental risks for all" by pulling out of the treaty.
Putin said on Monday that Moscow would be forced to start developing intermediate-and shorter-range missiles if it's confident that Washington has launched the production of it own weapons.
China will take countermeasures if the USA deploys intermediate-range missiles in Asia, a Chinese foreign ministry official said on Tuesday.
He said Moscow expected Tokyo to soon station the U.S. MK-41 missile-launching system in Japan.
"If Russia obtains reliable information that the United States has finished developing these systems and started to produce them, Russia will have no option other than to engage in a full-scale effort to develop similar missiles", Putin said in a statement.
Now that an arms control treaty has been abandoned, Vladamir Putin says he'll keep track of United States missile development by spying.
Cairo explosion with 20 dead involved a vehicle bomb
Monday's attack was more bad news for a nation that depends heavily on tourism for revenue and foreign currency reserves. The Health Ministry said it had evacuated patients from the oncology centre to other hospitals in Cairo.
Sudan's military, protest leaders sign constitutional declaration
The parties are expected to initial Saturday's agreement later on Sunday as a preliminary to the final signing in two weeks' time. The talks between the protest movement and the generals had been repeatedly interrupted by deadly violence against demonstrators.
Prices Capped by Demand Concerns, Underpinned by Weak Dollar
Brent crude futures LCOc1 were down $1.31, or 2.12%, at $60.58 per barrel by 1420 GMT. Signs of rising oil exports from the United States also pressured prices on Monday.
According to the Russian president, potential threats arising from the USA withdrawal from the INF Treaty will be countered by Russian missile and cruise missile systems including the Kh-101, the Kinzhal, the Kalibr and the prospective Zircon hypersonic missile.
Russian Federation "will not deploy them in relevant regions until American-made missiles are deployed there", he said.
"Those words were addressed to the US allies", Konstantin Kosachev, the head of the foreign affairs committee in the upper house of Russia's parliament.
"In order to avoid chaos with no rules, restrictions, or laws, we need to once more weigh up all the risky consequences and launch a serious and meaningful dialogue free from any ambiguity", Putin said. "Those who place missiles automatically and willingly become a nuclear target with several minutes of flight time", Kosachev explained.
Putin issued his warning after holding a meeting with Russia's Security Council to discuss the United States move, which Moscow had argued against for months, warning it would undermine a key pillar of global arms control.
But he also said Russian Federation is ready to resume full-fledged negotiations on strategic stability and security anytime.