Nexus is offering a £1,000 reward for information leading to the arrest of the thieves who attempted to steal cables from the Metro system.
It caused Metro service disruption between St James and North Shields for most of Friday June 12.
The thefts occurred between Byker an Chillingham Road Metro stations, damaging sensitive power supply equipment which is needed for trains to operate. Nexus has since recovered the damaged cables and patrols have been stepped up.
Customer Services Director at Nexus, Huw Lewis, said: “I urge anyone with any information to come forward. We are offering a £1,000 reward for information that leads to the thieves being caught.
“Cable theft causes a huge amount of disruption to our customers as it halts Metro services while we carry out repairs. Metro runs on high voltage power so anyone who attempts to cut through trackside cables risks being seriously injured or killed.”