A cyber attack crippled thousands of computers around the world (click for more)
The attack disrupted operations at a number of ports, including Denmark Mumbai and Los Angeles.
The virus is believed to have emanated from Ukraine where it infected computers after users downloaded a popular tax accounting package or visited a local news site, national police and international cyber experts said.
The malicious code locked machines and demanded victims post a ransom worth $300 in bitcoins or lose their data entirely.
