City police chasing a suspected car thief on foot forced a lock-down at Roland Park Elementary/Middle School in the city's northwest neighborhood for less than an hour Monday morning. The city dispatch notified area schools of the incident, which began about 8:10 a.m. Police chased the suspect, who abandoned the stolen car and ran across a field at the school in the 5200 hundred block of Roland Avenue. Staff heard police calling "Stop" and saw the suspect continue running, officials said. Staff opted to lock down the school at about 9:40 a.m., solely as a precaution. The suspect, who did not approach the school building, was apprehended in the unit block of Elmwood Road and remains in custody.