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SAN DIEGO (CNS) – A wildfire blackened swaths of brushy land on the grounds of Camp Pendleton Wednesday, sending clouds of dark smoke over northern San Diego County and prompting evacuations of some facilities on the military base.

The blaze began spreading out of control toward the eastern side of the Marine Corps installation about 2:30 p.m., fire officials said. As of shortly before 4 p.m., the burn zone had grown to about 1,000 acres, according to the base’s public-affairs office.

Just before 7:30 p.m., officials reported the fire was at 925 acres with no containment.

“CPFD will remain on site working the fire,” officials said in a tweet. “More assets will arrive in the morning. More updates to follow in the morning.”

Authorities cleared people out of various areas on the installation, including Lake O’Neill Campground, as a precaution.

Due to the fire, Basilone Road and Stagecoach Road were closed for a time with the closure extending from Vandergrift to Las Pulgas Road, officials said. By about 7 p.m., Basilone Road had reopened up to the Stagecoach Road intersection and the Basilone Road and Vandergrift Boulevard intersection was reopened as well. All gates remain open.

Fire crews had been setting and monitoring brush-clearing controlled burns on the base this week, but it was not immediately clear if that activity was related to the wildfire.