Oil prices rose in Asian trade today on renewed fears about Ukraine after pro-Russian protesters seized government buildings in the eastern city of Donetsk. New York's main contract West Texas Intermediate (WTI) for May delivery rose 46 cents to 100.90 dollar a barrel in mid-morning trade and Brent North Sea crude for May gained 31 cents to 106.13 dollars.The pro-Kremlin militants declared independence and vowed to hold a vote on joining Russia, fuelling concerns that Ukraine will fragment after Crimea was absorbed into its giantneighbour last month following a controversial referendum. Russian troops remain massed on its border with Ukraine, exacerbating fears of a military conflict.