NEW YORK (CBSNewYork) — Seven people were taken to the hospital after a lightning strike in the Bronx on Thursday.

Sources tell CBS2 a 13-year-old boy is in critical condition.

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The other six people are expected to survive.

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The Parks Department says the group was sitting on the sand at Orchard Beach around 5 p.m. when they were struck by lightning during the fast-moving storm.

“Prior to the incident, lifeguards had cleared all swimmers from the water, and Parks staff made announcements over the public address system instructing patrons to clear the beach,” the Parks Department said in a statement.

AS CBS2’s Jenna DeAngelis reports, weather maps show lightning swiftly moved in over Orchard Beach at that exact time.

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The FDNY says children and teenagers are among those hurt.

Jenna DeAngelis