LAGUNA NIGUEL ( — A motorist possibly disgruntled with the government struck a man outside a federal building in Laguna Niguel Thursday, raising security concerns.

About 4:30 p.m., a police cruiser was chasing a car toward the Chet Holfield Federal Building at 24000 Avila Road, according to witnesses.

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The vehicle made it through the concrete barriers and hit a federal employee, possibly a security guard, in the back of the federal building. Paramedics rushed him to a hospital with unknown injuries.

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The suspect was arrested. Witnesses said they saw him scoping out the parking lot earlier in the day and was asked to leave.

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The bomb squad searched the suspect’s car but found no explosives, authorities said.