Police said the man inappropriately touched himself while standing next to a woman on the train.
Murder charges have been filed in a deadly North Side fire that broke out Tuesday, police said.
Police report Tuesday's fatal fire at a Rogers Park apartment building was intentionally set, killing one person.
The missing girl was found Wednesday afternoon, police said.
An apartment building caught fire in the Rogers Park neighborhood.
Three young children were found living in squalid conditions in their home in Albany Park, police said.
A homeowner in the Bowmanville neighborhood gave the 40th Ward Office a security video, and the suspect is now in custody, the office said.
The attack happened near the Argyle stop, police said.
In two separate incidents, pregnant women noticed the man masturbating near them, police said.
Both were in serious condition, police said.
Burglars are breaking into homes through rear windows or unlocked doors, police said.
The woman was attacked Tuesday on Chicago's North Side.
A man has been peeking in windows on North California Avenue, police said.
Thieves are stealing the converters from vehicles in Lincoln Square, Lake View, North Center and Ravenswood, police said.
All northbound lanes were blocked off at Montrose, Illinois State Police said.
Thousands of photos and videos of child pornography were found on the Northwest Side man's devices, federal prosecutors said.
The burglars are prying open back doors and windows to get into homes, police said.
One of the people who escaped the fire was in critical condition, officials said.
A little girl is recovering after she was struck by a stray bullet in Albany Park, police said.
A victim was shot in one of the robberies, police said.
The victim was stabbed on West Wilson Avenue on the North Side, police said.
A woman was on a station platform in Ravenswood Manor when a man sexually abused her, police said.
A man's condition has stabilized after he was treated for smoke inhalation, officials said.
Police are searching for suspects driving a Blue Nissan Versa, authorities said.
Police said a man told a 13-year-old girl to get into his car on Chicago's North Side.
Police have issued a community alert for Lincoln Square, North Center and Ravenswood vehicle owners.
The camera caught three suspects trying to pry open the back door of a home.
Police said the man followed an 11-year-old girl in Albany Park, and tried to kidnap her.
The officer was outside the Lincoln District police station when he shot himself in the leg, officials confirmed.
Police are searching for two suspects who targeted victims in Uptown.
A deadly fire broke out in a home on Chicago's North Side, according to fire officials.
Two teenagers were taken into custody a string of armed robberies on Chicago's North and Northwest Sides.
Update: police said at least 13 victims were targeted early Monday on Chicago's Northwest Side.
A teenager has been charged with attempted murder after a North Side shooting.
Police will be looking for impaired drivers in the Albany Park area Saturday.
A man allegedly went into a Northwest Side home and demanded money from a resident at knifepoint, police said.
FBI said a bank robber escaped to a home in Portage Park. Police SWAT teams surrounded the home.
A woman said she was sexually assaulted between the Irving Park and Addison stops.
There were nine vehicle thefts in less than three weeks in February, police said.
Police said a 19-year-old man was drunk when he assaulted a conductor in Lakeview.