(North Scituate, RI)--Rhode Island State Police Superintendent James Manni is asking questions after ammunition materials were discovered at education centers twice this week.Spent bullet shell casings were reportedly found at Community College of Rhode Island and Rhode Island College, and a live round was found on a school bus in Burrillville last week.Manni said on Thursday that he wants police to find out if the three incidents are coincidental or if they are connected.Regarding the two discoveries at CCRI and RIC, Manni says there is currently no credible threat.