A 19-year-old man from Floriana was remanded in custody while a 14-year-old from Msida was conditionally discharged for three months after the two pleaded guilty to causing more than €1,500 damage to public property.
They also pleaded guilty to breaching the peace.
The 19-year-old, Niko Zammit, was also charged with breaching conditions of a previous release, escaping custody and disobeying police orders.
He was ordered to pay half the cost of the damage.