Fifth Squad detectives are looking for a masked knife-wielding bandit who took cash from a Franklin Square gas station Monday, Nassau County police said.

The suspect entered the Exxon station at 1111 Hempstead Tpke. at about 9:45 p.m. and demanded money from the clerk.

He took an undisclosed amount of cash from the register and then ran off south on Scherer Boulevard.

No injuries were reported.

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Police said the suspect wore all black and was in his 20s.

Anyone with more information can call Crime Stoppers at 800-244-8477. All information will be kept confidential.