India, May 26 -- Oil prices eked out modest gains on Monday after Ukraine was hit by a massive Russian drone and missile attack for the second night in a row, raising supply concerns.

Oil prices were also buoyed by a weaker dollar and U.S. President Donald Trump's decision to extend a deadline for imposing steep tariffs on the EU.

Benchmark Brent crude futures rose 0.4 percent to $64.48 a barrel in early European trade while WTI crude futures added half a percent to trade at $61.82.

At least 12 people were killed and more than 60 injured early Sunday following a second consecutive night of large-scale Russian drone attacks, Ukrainian authorities said.

Russian forces reportedly launched a barrage of 367 drones and missiles at Ukrainian c...