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MIAMI (CBSMiami) – Two men have been arrested and an alleged accomplice is dead following an armed robbery in Miami.

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Marcel Antonio Bolanos, 19, and Steven Palacio, 19 were taken into custody by Miami Police and charged with Second Degree Murder and Robbery with a Deadly Weapon.

According to authorities, at approximately 11:30 p.m. on Friday, the victim was walking in the area of NW 2nd Court and NW 79th Street when he was approached by Bolanos, Palacio, and a third man, 18-year-old Alberto Medal.

At gunpoint, they then took the victim’s belongings.

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However, a witness, who was also carrying a firearm, saw the crime unfold and shot at the three young men to stop the robbery, striking Medal.

“We do know that a Good Samaritan in the area saw the entire crime unfold, armed himself with a handgun and began to fire at the three robbers. One of them was struck,” said Miami Police Ofc. Kenia Fallat.

The three crooks fled the scene to seek medical attention, Miami Police added.

Medal died later at Jackson Memorial Hospital.

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Police are now searching for the Good Samaritan who opened fire, as well as anyone who may have witnessed the crime.