CHICAGO (WPVI) -- Two Chicago police officers were fatally struck by a train Monday as they investigated a report of gunshots on the city's far South Side.
Eduardo Marmolejo, 37, and Conrad Gary, 31, were pursuing a person who had headed toward train tracks and were hit shortly after 6 p.m. as the commuter train passed through the area, Police Superintendent Eddie Johnson said.
"There was no stop at that location so the train was probably going somewhere between 60 and 70 miles per hour," Johnson said during a news conference.
He said an individual was taken into custody and a weapon was recovered. He said the investigation was still in the early stages and that more details would be released at a later time.
VIDEO: Procession to medical examiner's office for fallen officers
Marmolejo had been with the department for 2 years and Gary for 18 months, Johnson said.
Chicago Mayor Rahm Emanuel, who also spoke at the news conference, said the city had lost "two young men, both fathers with young families."
"There are no words that can express the grief, the sense of loss. It just knocks you back on your heels," he said.
VIDEO: Bodies of fallen CPD officers arrive at medical examiner
Chicago police use "ShotSpotter" technology, or sensors that monitor for the sound of gunfire and alert police. Johnson said the two officers went to the scene Monday after a "ShotSpotter" alert went out.
"It just highlights again how dangerous this job can be. I often say that the most dangerous thing a police officer can do is take a weapon off of an armed individual," Johnson said.
The train that struck the officers was operated by a commuter rail line that links northern Indiana and Chicago, according to media reports.
Police spokesman Anthony Guglielmi said the officers pursued the suspect on foot.
VIDEO: Chopper live over the scene
In 2002, Chicago police officer Benjamin Perez was fatally struck by a commuter train while conducting surveillance on narcotics activity on the city's West Side.
Two other Chicago officers besides Marmolejo and Gary were killed in the line of duty this year.
Officer Samuel Jimenez was killed in a shootout last month after he chased a gunman inside a hospital on Chicago's South Side . The shooter also killed two other people - his ex-fiancee who was an emergency room doctor and a pharmacy resident - before taking his own life.
And in February, Cmdr. Paul Bauer was fatally shot while pursuing a suspect in the Loop business district.
"I think it's really important that we put our arms around the Chicago Police Department and hold them up and support them at this critical juncture, because we are so dependent on their professionalism and their sense of duty," Emanuel said Monday night.
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