The woman told police that yesterday she was putting her son to sleep by reclining on a cot. When she got up she found that her braid has been cut, they said.
On getting the information, City SHO Inspector Sukhpal Singh reached the spot.
"We are investigating the matter," he said today.
Earlier, a 23-year-old woman had complained to the police that her hair was cut off by someone when she was watching TV at her house in Palahi village.
Notably, over the past one month, many braid-chopping incidents have been reported from parts of Punjab and Haryana.