As the investigation into the discovery of chemicals capable of making explosives continues in London, Ont. police have also used warrants in Ottawa and Gatineau, Que. No other details have been released about the warrants, what police are looking for or what, if anything has been found. Four people have been charged following a trespassing investigation at Western University that led to the seizure of a loaded firearm and the discovery of hazardous chemicals inside a home near the university campus. The people charged range in age from 21 to 27 years old and are from London and Ottawa. According to police, the investigation remains active, and additional information will be provided as appropriate. Police cannot provide an exact timeline, but said residents in the area of Chesham Avenue can expect to see a continued police presence in the area. Road closures