Iran is a top 10 oil and gas producer, making its energy sites crucial to both regional and global markets.

Israel and Iran are engaged in attacks for a fifth straight day, with Israel targeting Iran’s nuclear facilities, military sites, oil and gas facilities, and state TV headquarters.

The escalation has raised fears of a widening conflict and turmoil in global energy markets.

Iran is one of the top global producers of oil and gas and holds the world’s second largest proven natural gas reserves and the thirdlargest crude oil reserves, according to the United States Energy Information Administration.

With about 157 billion barrels of proven crude oil, Iran holds about a quarter (24 percent) of the Middle East’s and 12 percent of the world’s proven oil reserves.