CHICAGO (WLS) — A shooting on a CTA train in the Loop left one man dead and another wounded Tuesday morning, Chicago police said.

The shooting took place at about 1:22 a.m. in the 100-block of North Wells Street.

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Police said the two victims, 23 and 44 years old, got into a verbal altercation with a male suspect who was armed with a knife.

After the altercation became physical, one of the victims took out a gun, police said.

The suspect was able to get control of the gun and fired, hitting the two men.

A 44-year-old man was shot in the abdomen and transported to Northwestern memorial Hospital, where he was pronounced dead, police said.

A 23-year-old man was wounded in the wrist and transported to Northwestern Memorial Hospital, where he was listed in fair condition, police said.

The suspect fled the scene and is not in custody, police said. Area Three detectives are investigating.

The shooting investigation disrupted trains in the Loop, before service began resuming at around 5:30 a.m.

This investigation comes as the CTA faces growing pressure to create a more aggressive safety plan.

Last week the Federal Transit Administration rejected the CTA’s safety plan hours after it was implemented.

The CTA’s plan included more police, private security, and K-9 security staffing.

The plan also includes expanding a voluntary program that allows officers to sign up to patrol the CTA on their days off

However, The FTA believes the plan does not go far enough and is urging the CTA to take more aggressive crime reduction measures to protect riders.

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