Oil prices dropped sharply on Monday as weak manufacturing data from China and Europe weighed on the demand outlook while investors braced for this week’s meeting of officials from OPEC and other top crude producers on supply.

Brent crude futures settled $3.94, or 3.79%, lower at $100.03 per barrel.

U.S. West Texas Intermediate crude ended the day at $93.89 per barrel, for a loss of 4.8% or $4.73.