<p>An alert signalling an incident at a major nuclear power plant near Toronto was sent "in error" to millions of residents Sunday, causing a scare and prompting calls for an investigation.</p>.<p>The emergency alert went out shortly before 7:30 am (1230 GMT). Though intended for residents living within a 10-kilometer (six-mile) radius of the Pickering Nuclear Generating Station, it went to all Ontario residents.</p>.<p>About an hour later, the Ontario Power Generation company that manages the nuclear plant announced on Twitter that the alert was issued by mistake.</p>.<p>"There is NO active nuclear situation taking place at the Pickering Nuclear Generating Station," it said.</p>.<p>"The previous alert was issued in error. There is no danger to the public or environment."</p>.<p>One of the world's largest nuclear power plants, the Pickering facility is located about 50 kilometers east of Toronto, Canada's most populous city, with three million inhabitants.</p>.<p>Several local officials, including Pickering Mayor Dave Ryan, immediately demanded an investigation of the incident.</p>.<p>"As many of you, I was very troubled to have received that emergency alert this morning," Ryan said on Twitter.</p>.<p>"While I am relieved that there was no actual emergency, I am upset that an error such as this occurred. I have spoken to the province and am demanding that a full investigation take place," he said.</p>.<p>Toronto mayor John Tory also called for a probe, saying area residents had been "unnecessarily alarmed by this event.''</p>
<p>An alert signalling an incident at a major nuclear power plant near Toronto was sent "in error" to millions of residents Sunday, causing a scare and prompting calls for an investigation.</p>.<p>The emergency alert went out shortly before 7:30 am (1230 GMT). Though intended for residents living within a 10-kilometer (six-mile) radius of the Pickering Nuclear Generating Station, it went to all Ontario residents.</p>.<p>About an hour later, the Ontario Power Generation company that manages the nuclear plant announced on Twitter that the alert was issued by mistake.</p>.<p>"There is NO active nuclear situation taking place at the Pickering Nuclear Generating Station," it said.</p>.<p>"The previous alert was issued in error. There is no danger to the public or environment."</p>.<p>One of the world's largest nuclear power plants, the Pickering facility is located about 50 kilometers east of Toronto, Canada's most populous city, with three million inhabitants.</p>.<p>Several local officials, including Pickering Mayor Dave Ryan, immediately demanded an investigation of the incident.</p>.<p>"As many of you, I was very troubled to have received that emergency alert this morning," Ryan said on Twitter.</p>.<p>"While I am relieved that there was no actual emergency, I am upset that an error such as this occurred. I have spoken to the province and am demanding that a full investigation take place," he said.</p>.<p>Toronto mayor John Tory also called for a probe, saying area residents had been "unnecessarily alarmed by this event.''</p>