Police are investigating a man after he travelled to and from Spain despite having coronavirus symptoms.
The unnamed "superspreader" is believed to have fallen seriously ill after he flew back to Manchester Airport.
He is now believed to be in intensive care - reports the Manchester Evening News.
Despite his condition, Greater Manchester Police has launched an investigation into alleged breaches of restrictions designed to prevent the spread of coronavirus.
People who have developed Covid-19 symptoms such as a new continuous cough, a high temperature or a loss of taste or smell are advised to self-isolate for ten days following onset and arrange a test.
People who fail to self-isolate despite a positive test face a fine of up to £10,000. They can also be prosecuted. Official advice says people should not travel if they have experienced symptoms within seven days of departure and must quarantine for ten days on their return from Spain.
Greater Manchester Police confirmed it has started an investigation into reports that a man had travelled to and from Spain despite allegedly displaying symptoms.
The man, who is believed to be from Heywood in Rochdale, which has registered 919 positive coronavirus cases in the last week, a rise of 29 per cent on the week before.
A statement from GMP said: "On Sunday 11 October 2020, police received a report that a man had allegedly breached Covid-19 restrictions by travelling to and from Spain via Manchester Airport whilst displaying symptoms linked to Covid-19.
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"An investigation is underway."
Anyone with information is asked to contact GMP on 101 quoting incident number 3162 of 11/10/2020. Details can be passed on anonymously to Crimestoppers on 0800 555 111.