Police in Derry investigating a fire at vacant premises on the outskirts of the city last night are appealing for witnesses and information.
Northern Ireland Fire & Rescue Service (NIFRS) reported the blaze at a former school in Gransha Park to police at approximately 10:50pm.
Along with crews from the NIFRS, police attended.
The blaze is being treated as arson, and a male aged 17, and a female, also aged 17, have since been arrested on suspicion of arson and they both remain in custody this morning.
Chief inspector Jonny Hunter said: "I am appealing to anyone who has information about this fire to call us on 101, quoting reference number 2117 of 20/06/20.
"You can also submit a report online using our non-emergency reporting form via http://www.psni.police.uk/makeareport/
“Crimestoppers can be contacted anonymously on 0800 555 111 or online at http://crimestoppers-uk.org/."
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