A Lansdale Borough teen is behind bars. Police say he stabbed his brother at around 6pm on Sunday. It happened on the 300 block of West 6th street. Police say the stabbing happened as a result of a heated argument. His brother is believed to be in his early 20’s. Police say, multiple charges have been filed against the teen, including two counts of felony aggravated assault. His brother was treated at Abington Memorial Hospital. The teen is being held at the Montgomery County Correctional Facility after failing to post 20-thousand dollars bail.