India, June 2 -- Indian shares fluctuated before ending on a flat note Monday.

A cautious undertone prevailed as the U.S. and China accused each other of violating their Geneva trade agreement and U.S. President Donald Trump threatened that he would increase tariffs on steel and aluminum to 50 percent.

Higher oil prices amid heightened geopolitical tensions also kept investors on edge after Ukraine launched a major drone strike on Sunday, destroying 40 key Russian aircraft, including the Tu-95 and Tu-22 M3 long-range bombers capable of deploying conventional and nuclear weapons as well as the A-50.

Oil prices were up more than 3 percent in European trade as escalating geopolitical tensions and reports of more U.S. sanctions on Moscow off...