CHICAGO (CBS)-- Chicago police are investigating at least 10 overnight robberies across the city.
The crime spree began just before 1 a.m. and ended before 2 a.m.; some incidents turned violent.
The oldest victim in the string of robberies is a 78-year-old man. His attack was captured on camera.
Police say six men robbed him in Lakeview while walking outside in the 1900 block of West Wolfram Street. They demanded his items, and he complied before several suspects punched him repeatedly.
"When it was happening, I was just like, I don't understand what's going on," said the man, who asked to not be identified.
He screamed for help.
He added, "I was on the ground and then started yelling. My wallet must've fallen off. They saw that and they wanted that instead probably, and then they left."
The suspects took off in a dark-colored sedan. The 78-year-old man was taken to the hospital in good condition.
He said when police arrived, they told him he wasn't the only one who got attacked.
"The police when they came here, they said, 'You're the sixth one today,'" the man said.
Just 10 minutes later, a 53-year-old man was robbed by four armed men in the 700 block of West Belmont Avenue. He had just exited the bus and was heading to his building when he noticed the suspects.
"Four guys jumped out of the car with guns, came up to me, and demanded my stuff. I tried to fight them off. One guy hit me with a gun. His gun right in my head and got all my items," Justin Wilkie said.
Police say those suspects also got away in a dark-colored sedan.
The other northside robberies took place in the following locations:
- 3000 Block of North Clark Street
- 4000 Block of North Lincoln Avenue
- 4400 Block of North Lincoln Avenue
- 2800 Block of North Lincoln Avenue
- 1600 Block of West Wilson Avenue
- 300 Block of West Webster Avenue
Another robbery took place in The Loop just before 2 a.m. A 42-year-old man was in the 800 block of South Michigan Avenue when she was approached by four men armed with handguns. The victim told CBS 2 he is a valet attendant at Le Méridien Essex Chicago hotel. He said the robbers took his phone, Airpods, and the two-way radio he uses at the hotel. They also hit him twice in the head with a gun, and drove off in a dark-colored sedan.
Police have not confirmed if the robberies are connected.
No arrests have been made.
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