CHICAGO _ The Naval Station Great Lakes was placed on lockdown Friday morning after a car went through a security checkpoint without providing credentials, according to authorities.
"We had a gate runner at 7:09 a.m. where someone drove through the entry control area without showing credentials and kept going," said John Sheppard, a spokesman for the base near North Chicago. "They are still looking for the person at this time."
In a tweet, everyone on the base was told to "take cover in nearest building or structure. Await instructions. All gates are closed."
No injuries have been reported.
Chris Covelli, a spokesman for the Lake County sheriff's office, said the department was not assisting and was told there was no outside threat.
A graduation on the base, scheduled for 9 a.m., has been postponed until 10 a.m. because of the lockdown, according to the base. "Attention families and friends of graduation this morning," reads a Facebook post by the U.S. Navy Recruit Training Command. "Due to a variety of circumstances this morning, the graduation ceremony is delayed by one hour."
The base is the Navy's largest training installation and the home of the Navy's only boot camp. It covers more than 1,600 acres along Lake Michigan.
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