Oil prices climbed about 4% on Tuesday on signs of higher demand in Europe and China, rising tensions in the Middle East and as buyers emerged the day after prices collapsed to a four-year low on a decision by OPEC+ to boost output. Brent futures rose $2.37, or 3.9%, to $62.60 a barrel at 11:12 am (1512 GMT). US West Texas Intermediate (WTI) crude gained $2.42, or 4.2%, to $59.55. OPEC+ decided