Complex event processing (CEP) systems are used to process event data from multiple sources to infer events corresponding to more complicated situations. Traditional CEP systems with central processing engines have failed to cater to the requirement of processing large number of events generated from a large number of geographically distributed sources. Distributed CEP systems have been identified as the best alternative for this. However, designing an optimal distributed CEP system is a non-trivial task, and many factors have to be considered when designing the same. This paper presents the VISIRI distributed CEP system, which focuses on the problem of optimally processing a large number of different type of event streams using a large number of CEP queries in a distributed manner. The CEP query distribution algorithm in VISIRI is able to distribute a large number of queries among a set of CEP nodes in such a way that the event duplication in the network is minimized while not compromising the overall throughput of the system.