An explosion at a wastewater treatment plant in Baltimore left three contractors injured, city fire officials said Tuesday afternoon.

Explosions were reported in occupied Crimea, with a fire near the Tavriyskaya Thermal Power Plant following a drone attack and air defence activity reported in Simferopol and Perevalne.

Windsor police Sgt. Warren Levack, the lead explosive disposal unit officer on the case, told court investigators were unable to determine the exact origin point, or “seat,” of the explosion. Levack said he was called to the plant after reports of an explosion. When he arrived, he said, he was taken to the storage area where the incident was believed to have occurred.