CHICAGO (STMW) — Seven people have been charged after a man who refused to flash a gang sign was attacked with a machete Monday morning at a Brown Line station in the Northwest Side Albany Park neighborhood.

The attack happened about 12:35 a.m. Monday at the Kedzie station in the 4600 block of North Kedzie, where a group of suspects went up to two men, ages 17 and 26, and told them to flash gang signs, authorities said.

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The men refused, saying they were not in a gang, police said.

Mario Elvira, 18, then pulled out a “cutting instrument” and struck the 26-year-old in the head, leaving him with cuts to his head and neck, police said. A source said the weapon was a machete.

The victim was taken to Swedish Covenant Hospital where his condition has stabilized, police said.

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Elvira, of the 5300 block of West Foster, and three other men are charged with one count each of robbery, aggravated battery and trespassing on CTA property, police said. They include: Jean Salvatierra, 23, of the 4800 block of West Belle Plaine; Kevin Ramirez, 19, of the 1300 block of West Rosedale; and Kevar Preston, 20, of the 3600 block of West Cullom.

On Tuesday, Elvira and Preston were each ordered held on $450,000 bond, while Salvatierra and Ramirez were each ordered held on $250,000, according to the Cook County sheriff’s office. They are all scheduled to appear in court Sept. 15.

Three 15-year-olds — two boys and a girl — were also charged with trespassing on CTA property, police said. One of the teens was also charged with aggravated assault. Their names were not released because of their ages.

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(Source: Sun-Times Media Wire © Chicago Sun-Times 2014. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)