Cryptocurrency exchange Poloniex, owned by Justin Sun, has been hacked resulting in the theft of over $126 million worth of digital currencies.

The attack involved suspicious transactions across different blockchains and was detected by security firms Peckshield and Cyvers.

Poloniex has disabled the affected wallet and is working with blockchain security platforms to investigate the incident.

Owner Justin Sun has pledged to reimburse affected users and is considering collaborating with other exchanges for fund recovery.

Sun has offered a 5% reward to the hackers if the stolen money is returned within seven days.

The incident raises concerns about the vulnerabilities of digital asset platforms.

Poloniex has taken measures including freezing a portion of the stolen assets.

The hack has similarities to previous attacks attributed to North Korea's Lazarus group.