Two men were killed after a fight with an armed robber on the city's Southwest Side on Saturday evening.

It happened just before 6 p.m. in the 3800 block of West 26th Street.

Preliminary reports by Chicago police said that an unknown man walked into a jewelry store, showed a gun, and demanded property. He then took the property and left the business.

Police said while outside, the armed robber got into a fight with two men, 25 and 63, at which point he fired multiple shots in their direction.

Both victims were taken to Mt. Sinai Hospital.

The 63-year-old suffered multiple gunshot wounds to his face, head, and body and was in critical condition, and was later pronounced dead. He was identified as Faustino Alamo Dominguez of Berwyn.

The 25-year-old suffered multiple gunshot wounds to his body and was also in critical condition, and was later pronounced dead. He was identified as Luis Alamo of Berwyn.

The suspect entered a white SUV and fled southbound on Springfield Avenue.

As of Saturday night, no arrests were made. Area 4 detectives are investigating.

Crimestoppers is offering a reward of up to $10,000 for information leading to an arrest and conviction of the suspect. 

Anyone with information on who is responsible can make an anonymous call to 1-800-535-STOP.