Contemporaneous information relating to an event is collected in response to receiving an indication of an event. A plurality of mobile devices located in a specified area related to the event is identified based on location information associated with each of the mobile devices. A request for supplemental information is transmitted via at least one communication network to at least one of the plurality of mobile devices located in a specified area related to the event. The requested supplemental information is received over the at least one communication network from the at least one of the plurality of mobile devices.