By Saqib Iqbal Ahmed, Suzanne McGee and Linda PasquiniNEW YORK/GDANSK (Reuters) -Investors were on edge ahead of markets reopening late on Sunday, with risks ranging from heightened prospects of a broad Middle East war to U.

Oil prices surged, stocks dropped and investors flocked to safe havens like gold on Friday after tensions between Israel and Iran escalated, stoking concerns of a broader conflict in the region.

They've since come off highs and were trading almost 8% higher at about $73 a barrel at 8:30 a.m. ET.International benchmark Brent crude oil futures gained as much as 13% and were up about 7% above $74.