SIOUX FALLS, S.D. (AP) — South Dakota is joining a national anti-terrorism effort and officials at the state's Homeland Security Office are encouraging citizens to report suspicious activity.

The state is taking part in the national "See Something, Say Something" campaign, which was originally implemented by the New York City Metropolitan Transportation Authority.

State Homeland Security Director Steve Pluta says the campaign is designed to ask for the public's help. Citizens are encouraged to report any suspicious activity they observe.

Pluta says people that report suspicious activity should note who or what they saw, when they saw it, where it occurred and why it is suspicious.

He says being vigilant, even in a small state like South Dakota, is important.

For more information on the national program.

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