A total of 31 credit card identity thefts have been reported in just four days in Bend; and Monday, police said there could be more. Policeare still investigating how the credit card numbers were stolen, but say they were used all over the country. They say there's definitely a link between all 31 cases, but they just don't know what it is yet. Brian Hinderberger of Bend tells our news partner, News Channel 21 that his wife had called saying the bank had called her that someone in Mexico was trying to buy $600 worth of groceries. He immediately canceled his credit card. Bend Police Sgt. Chris Carney says that it's obviously a huge number, something they haven't seen in a year or two years, as far as the number of cards over short period of time. Police do know the numbers have been used at WalMarts from Colorado and Texas to Alabama and Tennessee.