Two men were discovered deceased at a highrise apartment complex on Falby Court in Ajax at around 3:40 a.m.
Police said a male in his 20s was also found dead in Bowmanville in the Courtice area east of Oshawa.
The news comes as Toronto deals with a spike in opioid-related deaths.
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But people were returning to their daily routines after the national holiday on Tuesday, and some businesses were open. She said her team had seen no signs of "centralised or localised manipulation" of the voting process.
York Regional Police said two people were taken to hospital and their condition is unknown. One of the men was in his 30s and the other was in his 40s.
"These drugs have been rearing their heads in a lot of the calls that we receive as frontline officers", Tudos said, pointing to 12 non-fatal overdoses that Durham police officers responded to in the past two weeks.
Residents are also being urged to "not be afraid" to call 911 in an emergency and state what drugs were involved so first responders can provide the proper course of treatment.
Police say the three overdoses occurred over five hours.
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Customs and Border Protectionstates the agents encountered the man carrying a large backpack along the global border. Agents observed a large group of people walking toward them on a trail and were apprehended without incident.
Many Canadian cities have grappled with drug overdose deaths in recent months, perhaps the most notable being Vancouver, which recorded 25 deaths and almost 600 overdose calls in June alone.
More than 1,000 people died of overdoses in British Columbia past year and the coroner says fentanyl was involved in many of those deaths.
"You never know what type of drugs are going to be mixed and what you're buying", he said, adding that there's no specific type of drug user that has emerged as predominantly at risk of overdose.
In light of the overdoses, officials in Toronto have vowed to speed up the opening of three planned safe injection sites and look at purchasing naloxone in bulk to get it into the hands of more people.
Eastern Bank Reduces Stake in Edison International (NYSE:EIX)
The utilities provider reported $0.58 earnings per share for the quarter, missing analysts' consensus estimates of $0.61 by $0.03. Since January 1, 0001, it had 38 insider buys, and 0 insider sales for $164,850 activity. (NASDAQ:SPLS) for 80,066 shares.