A.P. MOLLER-MAERSK

The Danish shipping giant was working to restore its operations a day after being hit by the cyber attack. "We have contained the issue and are working on a technical recovery plan with key IT partners and global cyber-security agencies," Maersk, which handles one in every seven containers shipped worldwide, said in a stock exchange announcement.

The Copenhagen-based group said its terminals were affected "in a number of ports", but added that its Maersk Line vessels were "manoeuvrable, able to communicate and crews are safe".

JAWAHARLAL NEHRU PORT TRUST

Operations at one of the three terminals at JNPT, India's biggest container port near Mumbai, were disrupted. The affected terminal, which is run by Maersk, was unable to load or unload shipments.

JNPT chairman Anil Diggikar said that with the Gateway Terminal India facility, also affected by the attack, unable to identify which shipment belongs to whom, the port is clearing cargo manually.

RUSSIA'S ROSNEFT

One of the world's biggest crude producers by volume, Rosneft said on Tuesday that its systems had suffered "serious consequences", but oil production had not been affected because it switched to backup systems for managing production processes.

WPP

The website of the world's largest advertising agency was knocked offline, and employees were told to turn off their computers and not use Wi-Fi, according to a person familiar with the matter. Sea Containers, the London building that houses WPP and other agencies, including Ogilvy & Mather, has been shut down, another person said.

BNP PARIBAS REAL ESTATE

The property arm of France's biggest bank, BNP Paribas, was affected. "The international cyber attack hit our non-bank subsidiary, Real Estate. The necessary measures have been taken to rapidly contain the attack," the bank said yesterday.

DLA PIPER

The multinational law firm in the United States reported being hit. It took down its systems as a "precautionary measure", meaning clients could not contact its team by e-mail or land line.

Similarly, its Australian offices warned clients that they were dealing with a "serious global cyber incident" and had disabled e-mail as a precautionary measure.

CADBURY

Production at its chocolate factory in Hobart,Tasmania, ground to a halt late on Tuesday after computer systems went down. Cadbury is owned by Mondelez International.

AGENCE FRANCE-PRESSE, REUTERS, BLOOMBERG