03:56 PM EDT, 06/23/2025 (MT Newswires) -- Energy stocks fell late Monday afternoon, with the NYSE Energy Sector Index declining 2.3% and the Energy Select Sector SPDR Fund (XLE) dropping 2.6%.

The Philadelphia Oil Service Sector Index slumped 4.4%, and the Dow Jones US Utilities Index rose 1.1%.

West Texas Intermediate crude and Brent prices tumbled. Qatar said its air defense systems intercepted Iranian missiles fired at the Al Udeid Air Base, the largest US military installation in the Middle East, according to news reports.

WTI declined 7.1% to $68.58 a barrel, and global benchmark Brent dropped 6.8% to $71.74 a barrel. Henry Hub natural gas futures fell 3.7% to $3.71 per 1 million BTU.

In corporate news, Oklo ( OKLO ) shares dropped past 5% after Craig-Hallum downgraded the stock to hold from buy.

Eni (E) reduced its personnel at the Zubair oil and gas field in Iraq, Reuters reported, citing a company spokesman. The precautionary move followed US attacks on key Iranian nuclear sites over the weekend, the report said. Eni was down 1.5%.

Centuri ( CTRI ) shares popped past 4% after it said Monday it was awarded over $575 million in contracts, reflecting a mix of gas and electric infrastructure work in the US.

Golar LNG (GLNG) said the floating liquefied natural gas vessel FLNG Gimi has reached the commercial operations date for a 20-year lease and operate agreement on the Greater Tortue Ahmeyim project offshore Mauritania and Senegal. Golar shares were down 1.1%.