The knife-wielding robber menacing small businesses in Nassau County is suspected of two more holdups in a 24-hour span, hitting a convenience store and a donut shop, police said.

The robber, disguised with a bandanna and sunglasses, made off with an unspecified amount of cash from a 7-Eleven in Westbury at 12:30 a.m. Wednesday, Nassau police said.

At 12:01 a.m. Tuesday, police believe the same suspect took cash from a North Valley Stream Dunkin’ Donuts.

The robberies are being investigated as part of a pattern of more than a dozen committed since March 1, police said.

Det. Lt. Richard LeBrun urged residents to be on the lookout when entering small businesses.

“We are very, very concerned,” he said. “He is becoming more brazen. He needs to be captured and apprehended by the police.”

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Suffolk police believe the same man robbed two Carvel stores — one in Commack on April 26 and another in Copiague on April 5.

Nassau detectives say the suspect is responsible for hitting at least seven Dunkin’ Donuts shops, two 7-Elevens, two Subway sandwich shops and two Carvel ice-cream stores.

Last month, after the suspect robbed a Subway in New Hyde Park, police called his arrest their No. 1 priority.

In the Wednesday robbery, detectives said the suspect brandished a large knife and demanded the clerk open the cash register. After removing an undisclosed amount of money he fled and was last seen heading south on Powells Lane.

The clerk, the only person in the store at 635 Powells Lane, was not injured. His description of the suspect matched those in the previous robberies, police said.

The robber is about 25 years old, 6 feet tall with a medium build. He wore a dark-colored hooded jacket, jeans and tan work boots, and covered his face with dark sunglasses and a dark-colored cloth, police said.

In the Tuesday robbery, the suspect, again armed with a knife, approached the counter of the Dunkin’ Donuts at 238-19 Linden Blvd. and demanded an employee open the register, police said. After obtaining an undisclosed amount of cash, the robber fled and was last seen on foot heading north on 238th Street, police said. None of the four employees was injured.

Nassau County police say this knife-wielding robber struck again early Wednesday, May 18, 2016, hitting a 7-Eleven on Powells Lane in Westbury. Photo Credit: NCPD

Anyone with more information can call Crime Stoppers, which has in this case increased its reward offer to $10,000, at 800-244-8477. All information will be kept confidential.

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With Nicole Fuller