Raids have been carried out on homes as part of a inquiry sparked by concerns fake tickets were being used on the Metro and buses.
Three people have been arrested in connection with a Metro and bus ticket fraud.
Police launched an investigation after concerns were raised that fraudulent tickets were being used.
Three search warrants were carried out in John Williamson Street, Vine Street and Linthorpe Court in South Shields.
Northumbria Police has said a number of counterfeit tickets were seized by police from the address in Linthorpe Court.
A 36-year-old man has been arrested on suspicion of handling stolen goods and two woman - aged 31 and 30 - have been arrested on suspicion of fraud by false representation.
They have been bailed pending further inquiries.
Metro Inspector Ian King said: "If anyone is thinking of using a counterfeit Metro ticket they may wish to think again - we will not hesitate to take action against anyone found to be in possession of a fake ticket, whether they're using the Metro or not.
"Our enquiries into this investigation are continuing and we would ask anyone who has information about this scam to come forward and speak to us about this."
A Nexus spokesman said: “Nexus has a zero tolerance approach to fraudulent travel on Metro and works with the Police and our contractor DB Regio to ensure that anyone who gets caught making or using counterfeit tickets will be prosecuted.”
To report information to police ring 101 ext 69191 quoting reference fwin 182 24/11/15 or Crimestoppers anonymously on 0800 555 111.