This was announced by Tony Blinken, the deputy national security adviser, at a congressional hearing on his nomination to be Obama's deputy secretary of state, Censor.NET reports citing Radio Liberty.
Blinken cited "serious violations" by Moscow of the Minsk agreement, which was signed by Russia, Ukraine and rebels from Ukrainian separatist regions of Donetsk and Luhansk on September 5 in the Belarus capital and imposed a cease-fire and set out steps toward peace. Blinken said providing Kyiv with lethal military aid may prompt Moscow "to think twice and deter them from further action."
Analysts say providing defensive military equipment to Ukraine has broad support in Congress.
Read also: "Kremlin Puppets in Eastern Ukraine Receive Weapons and Tanks from Russia in Unlimited Quantities" - British Foreign Ministry
As known, Ukraine has accused Russia of sending tanks and troops to eastern Ukraine in recent days to support the separatists.
NATO chief Jens Stoltenberg said on Nov. 18 that there had been a "serious military buildup" both in eastern Ukraine and on the Russian side of the border, and urged Moscow to pull back its forces.
Russia backs the separatists but denies it is directly involved in the conflict.
Blinken's comments come a day ahead of a scheduled two-day visit to Kyiv by U.S. Vice President Joe Biden.