Handsworth residents took to Facebook yesterday to issue the warning that fishing line had been tied across the well-used path.
One resident reported that four chilren were seen tieing the line across the path leading from Handsworth Church.
She also reported that a line had been put on a path going past two local schools.
Residents said they have now taken the dangerous line down and reported the incident to the police.
A number of schools are situated in the area, including Ballifield Primary School, Sunny Meadows Nursery and Handsworth Grange College.