Hanoi (VNA) - The Bank of Thailand (BOT) has confirmed that hackers have stolen information of more than 120,000 customers in a massive data breach into two major commercial banks.

Cyber security operators at BOT has vowed to step up security measures and oversight after Kasikornbank and Krung Thai Bank reported cyber attacks during the Buddhist Lent holiday last weekend, and BOT confirmed the attacks on August 1.

However, executives of both banks said no suspicious transactions took place.

Krung Thai Bank President Payong Srivanich said hackers used "advanced hacking techniques" to obtain personal data of 120,000 customers who had applied for credit online.

Payong said the bank was able to immediately stop the hacking after the bank's IT Division reported suspicious activities of stealing data.

Pipit Aneaknithi, President of Kasikornbank, said hackers got data of about 3,000 corporate customers who use an online bank guarantee service.-VNA