Oil prices slipped slightly on Tuesday, easing after strong gains in the previous session, as rising tensions between the U.S. and Venezuela and strikes on Russian oil facilities raised concerns about potential global supply disruptions.

Market activity remained subdued ahead of the year-end holidays, with prices still weighed down by steep losses this year amid worries over weakening demand and an impending supply surplus.By 5:11 GMT, Brent crude futures fell 10 cents, or 0.16 percent, to $61.97 a barrel, while U.S. West Texas Intermediate (WTI) crude eased 12 cents, or 0.21 percent, to $57.89 a barrel.