He tried to rob a bank, but apparently was either too impatient or nervous to wait around for any cash, police said.

Now, Nassau County police are searching for the would-be robber, who they said tried to rob the Citibank branch on Merrick Road in Rockville Centre just before noon Thursday.

Police said the suspect, believed to be in his mid-to-late 30s or early 40s, about 5-foot-7 and wearing a light blue button-down shirt, black jeans, a bandanna and sunglasses, walked into the bank -- and handed a demand note to a teller.

Police said there with 10 employees and two customers in the bank at the time.

But before the teller could comply with the would-be robber's demand, police said he "suddenly left the bank without any proceeds" and fled north through a rear parking lot.

No one was injured.

Police are asking anyone with information about the attempted robbery to call Crime Stoppers at 800-244-TIPS. All calls will remain confidential.

On the latest episode of "Sarra Sounds Off," we look at East Islip baseball's inspirational comeback story, Jared Valluzzi has the plays of the week and Tess Ferguson breaks down the top defensive players in girls lacrosse. 

Sarra Sounds Off Ep. 35: EI baseball, girls lacrosse and plays of the week On the latest episode of "Sarra Sounds Off," we look at East Islip baseball's inspirational comeback story, Jared Valluzzi has the plays of the week and Tess Ferguson breaks down the top defensive players in girls lacrosse.

On the latest episode of "Sarra Sounds Off," we look at East Islip baseball's inspirational comeback story, Jared Valluzzi has the plays of the week and Tess Ferguson breaks down the top defensive players in girls lacrosse. 

Sarra Sounds Off Ep. 35: EI baseball, girls lacrosse and plays of the week On the latest episode of "Sarra Sounds Off," we look at East Islip baseball's inspirational comeback story, Jared Valluzzi has the plays of the week and Tess Ferguson breaks down the top defensive players in girls lacrosse.

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