New Delhi, June 1 -- Over four years ago, Belarus' authoritarian President Alexander Lukashenko allowed longtime ally Russia to use his territory to invade Ukraine. Now officials in Kyiv are warning that Lukashenko could again allow his land to serve as a launchpad for more attacks by the Kremlin's forces.

While Belarus has not contributed troops to battle, Lukashenko has backed President Vladimir Putin's war effort by hosting Russia's nuclear weapons and military infrastructure, as well as producing components for Moscow's military industries. Earlier this month, the countries held joint drills of nuclear forces involving Russian weapons deployed in Belarus.

Lukashenko, in power for over three decades, has ruled the nation of 9.5 milli...