Brent futures fell $3.04, or 4%, to $72.28 a barrel by 10:54 a.m. EDT (1454 GMT). The global benchmark hit a session low of $72.21 a barrel, its lowest since March 20.
U.S. West Texas Intermediate crude (WTI) fell $3.04, or 4.2%, to $68.62. WTI dropped to a session low of $68.54 a barrel, lowest since March 24.