Police were called to the address in Ashington in the early hours of this morning, where they found the 20-year-old man with stab wound to the chest.
Three people have since been arrested on suspicion of wounding, and police are appealing for information about the incident.
The man is reported to be a in a critical but stable condition.
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A third of secondary schools in the North East are not good enough, inspectors have warned.
City of York Council cited the number of complaints it had received about the service and a recent well-publicised data protection breach.
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