A Wyandanch man arrested on drug charges concealed a loaded handgun from Suffolk authorities -- a security breach that was detected inside the Central Islip courthouse, according to court documents.

Akini Alukowatson, 21, was initially arrested by police at 4:03 a.m. on Oct. 18 and charged with possession of crack, records show.

The semiautomatic gun was found at 10:21 a.m. by sheriff's officers while Alukowatson, scheduled to be arraigned, was in the First District Court Detention Facility, records show.

Officers seized the miniature .380-caliber Cobra, and Alukowatson also was charged with introducing contraband and criminal possession of a weapon.

Alukowatson was arraigned Tuesday on the new charges. Bail was set at $25,000 cash bail or $100,000 bond, according to a court official.

Suffolk prosecutors could not be reached for comment. Officials with the Suffolk police department and sheriffs' office did not return calls or emails Friday or Tuesday seeking an explanation for how the weapon avoided detection.

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"The Suffolk County Police Department is conducting an ongoing investigation to determine how and where a weapon was acquired by the defendant," the department said Saturday in an email.

No other details were provided. It is standard procedure for suspects to be searched for weapons as they are transferred between the precinct, jail and court.

Alukowatson was arrested Friday on Jamaica Avenue in Wyandanch after he first dropped and then stepped on a clear plastic bag containing crack as Officer Kyle Simcox approached, according to court documents.

Thirty minutes later, during a search by Officer John P. Moore, a bag of marijuana was found on Alukowatson, charging papers say.

He was arraigned on the drug-possession charges Friday before Judge G. Ann Spelman.

Police said Alukowatson is unemployed.

The seized weapon -- a Cobra CA model -- is just 5.4 inches long and weighs 22 ounces when empty, according to the manufacturer's website. The gun is described as "compact, lightweight and easily concealed in a holster, pocket, vest, purse or backpack."