City of London Police have launched an investigation after thieves stole computer equipment, worth an estimated £1m, from the London headquarters of Deutsche Bank.
Thieves struck on Monday night, taking about 50 motherboards and I/O boards from the bank's Sun back-office servers at the bank's Houndsditch offices.
The theft is the latest in a string of computer thefts to hit City firms in recent months, a police spokesman said.
Deutsche Bank, which is reviewing its security following the thefts, insisted this week that the stolen equipment had not been used to process securities or client details. "It was virtually all development equipment. It was not hooked into the bank. There were no client details, no securities details," a spokesman said.
The bank said it was unclear how the thieves were able to take the equipment without being detected. One possibility is that they were able to bluff their way past security guards with inside help from subcontractors, maintenance workers or temporary staff.
The bank discovered the thefts on Monday night and replaced the equipment by Tuesday morning so that no users were affected.
"We are tightening security to make sure it does not happen again," said a spokesman.