Police has arrested twenty people in relation to the discovery of weapons at the Mt. Lavinia Magistrates' Court yesterday.

The Mt. Magistrates' Court was on a temporary lock down yesterday after a fully loaded pistol, a revolver and ten bullets were found hidden in a bag. 

Police believe the weapons were brought with intent to attack. 

The discovery comes on the heels of a planned attack on a prison bus in Kalutara, that killed seven.