An investigation into the cause of the explosion at a house in Newark in Nottinghamshire has today ruled out the domestic gas supply.
Police and fire crews will continue to establish what caused the explosion, which resulted in the death of Jeanette Rourke and Leslie Rourke on Sunday 19 May.
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A threatening email warning of a 'student with an explosive' has been sent to schools across the country.
Patrick Gunar was caught on CCTV attacking the girl on Cambridge Street in Pear Tree last month as she was returning from the local shop.
The case against William Billingham, who has yet to enter pleas to charges of murder and making threats to kill, was adjourned.