(QHA) -

U.S. lawmakers have introduced legislation that would impose tougher punitive measures against Russia over its actions in Ukraine, including sanctions on leading Russian banks, energy firms and weapons manufacturers, RFE/RL reports.

A group of 20 Republican senators are backing the bill, which was introduced April 30 and would impose sanctions on state-owned energy giants Gazprom and Rosneft, state arms manufacturer Rosoboroneksport, and leading lenders Sberbank, VTB, VEB, and Gazprombank.

The legislation, which was introduced by Senate Foreign Relations Committee ranking member Bob Corker (Republican-Tennessee) would also require the White House to boost "substantially" U.S. and NATO support for Poland and the Baltic countries.

It also authorizes the U.S. president to provide $100 million of direct military assistance to Ukraine, including antitank and antiaircraft weapons and small arms.

The bill also calls for sanctions on more Russian officials should Moscow fail to relinquish control of Ukraine’s Crimea territory, which the Kremlin annexed last month.