Oil prices up as Middle East tanker attacks heighten supply concerns

LONDON (Reuters) - Oil futures rose on Monday on increasing concerns about supply disruptions in the Middle East even as investors and traders fretted over global economic growth prospects amid a standoff in the Sino-U.S. trade talks.Brent crude futures were at $71.71 a barrel by 0912 GMT, up $1.09.U.S. West Texas Intermediate (WTI) futures were at $62.45 per barrel, up 79 cents. Saudi Arabia said on Monday that two Saudi oil tankers were among vessels targeted by a "sabotage attack" off the..