A Seaford man who Nassau police said was driving high on drugs Monday evening struck five cars and seriously injured one driver while traveling down Jerusalem Avenue.

Police said Sean McKenna, 51, was driving east on Jerusalem Avenue about 5:49 p.m. Monday when he hit five cars over the span of about a third of a mile, starting near Allen Drive and continuing until Mell Gate.

McKenna kept driving, police said. He soon left the road and struck a mailbox, then crashed into and destroyed about 100 feet of wood fencing, police said. He continued east, and then hit a wood utility pole, and police said his vehicle finally came to a stop soon after.

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When police got there, they determined McKenna was driving in "an intoxicated condition," police said. After his arrest, two bags of what police believed to be heroin were found in his vehicle, they said.

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Two people in the same car were hurt -- one seriously -- after McKenna's car struck theirs, police said. A 28-year-old man who was driving suffered a collapsed lung, lacerated spleen and a fractured pelvis in the crash, and was admitted to the surgical intensive care unit at a hospital. His 24-year-old female passenger was hit in the forehead, and was treated and released.

McKenna was charged with seventh-degree criminal possession of a controlled substance, second-degree reckless endangerment, driving while ability impaired by drugs, second-degree vehicular assault, leaving the scene of an incident with serious injury, and four counts of leaving the scene of an incident, police said.

McKenna was admitted to a hospital for an unrelated medical condition and will be arraigned "when practical," police said.