Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.
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(CNN) - Ukrainian security forces battled pro-Russian militants in the eastern flashpoint city of Slovyansk on Monday as Kiev tackled the gunmen who have overrun the region.
Military gains were evident on the main highway into Slovyansk, a rebel stronghold, as government forces moved in.
A CNN team on the ground saw a substantial number of militants bolster their defensive positions and checkpoints inside the city. One civilian car was hit in the fighting, its exterior damaged by bullet holes.