'Coronation Street' bosses are reportedly lining up Nick Tilsley and Gary Windass as suspects over the factory collapse.
The Underworld building's roof will be badly damaged with police discovering it was sabotaged, and it's said Ben Price and Mikey North's characters will be questioned as the authorities think it could have been an insurance scam.
An insider told The Sun newspaper's TV Bizarre column: "They have just filmed scenes where cops are asking questions about Nick, his whereabouts on the day and involvement in Underworld.
"When the victim's family ask officers if they think Nick did it as part of a insurance scam, they say they are exploring all lines of enquiry, but keep it vague.
In recent weeks, Ben filmed scenes where Nick was furious with Carla for trying to oust him out the business, so it could be revenge."
The roof collapse is set to kill off one major 'Corrie' character, and while Nick is seen as an obvious culprit, Gary doesn't help himself by disappearing just after the incident.
The source added: "Gary disappears after the factory death. His girlfriend Sarah panics and admits he took a bribe from Peter Barlow to keep quiet about the roof being dodgy and Carla knowing about it.
"It seems from the scenes that he also has money worries which is stressing him out."
Late last year, 'Corrie' boss Iain MacLeod confirmed the show's plans but refused to give any details on who will be involved.
He said: "We're knocking the factory down in March in a colossal big stunt.
"It will at first appear to be an accident, but will then be revealed to be a mystery and it'll have been some kind of criminal enterprise that causes it all to fall down.
"Somebody will be dying in said collapse. I'm not going to tell you who that is or who pulls the factory roof down! It's going to collapse. The roof will fall in.
"It plays out over four or five months. The resolution of a whodunit is so fundamental to the enjoyment of a viewer, so we want to keep that under wraps."f
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