Oil Prices Fluctuate Amid Israel-Hamas Fighting and Iran Nuclear Tensions

Oil futures being watched as bellwether amid Israel-Hamas tensions and Iran warnings.

Crude opened lower Sunday, but rallied Friday on concerns about possible Iran involvement and G7 pledge to sanction Russian oil.

Iran warned against escalation, but said it may have "no choice" if Israel's Gaza operation continues.

Israel closed northern border with Lebanon over Hezbollah attacks, raising fears of 2nd front.

White House warned Iran against escalation, moved naval forces to Mediterranean as "deterrence."