Derry electricity substation fire was started deliberately

A fire at an electricity substation in Derry was started deliberately.
The blaze was reported at about 6.45 on Friday evening at the substation on the Ferndale Road in the Galliagh area .
The fire  caused power cuts for up to 3,000 homes – 150 homes are still without power.
The Northern Ireland Fire and Rescue Service said youths had stored bonfire material close to the substation and this had been set on fire.