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WATCH: Grandfather pays tribute to 'strong little characters' who were killed in a house fire

Four siblings were killed in the Walkden fire. Credit: ITV Granada

The grandfather of four siblings who were killed at a house fire in Walkden has spoken for the first time since the tragedy.

Chris Pearson paid tribute to the "strong little characters'' who were "best friends".

Demi Pearson, 15, her eight-year-old brother Brandon and seven-year-old sister Lacie, died in the blaze in Greater Manchester, on Monday.

Their sibling, three-year-old Lia, died on Wednesday after being rushed to hospital in a critical condition.

Their mother (Chris' daughter) remains in a coma, unaware of what's happened.