The Government Railway Police on Wednesday claimed to have detected at least seven cases of thefts on long-distance trains with the arrest of three persons, a release said.

As per the GRP release, someone stole a purse belonging to a family travelling from Madgaon to New Delhi by the Ernakulam-Hazrat Nizamuddin Express on April 12. The purse contained jewellery worth Rs 36,500, it said.