Nvidia Corp, the most valuable publicly traded chipmaker in the US, said it is investigating an attack on its computer systems.
“We are investigating an incident. Our business and commercial activities continue uninterrupted,” Nvidia said in a statement.
“We are still working to evaluate the nature and scope of the event and don't have any additional information to share at this time.”
The Telegraph reported earlier that some Nvidia computer systems were knocked offline for up to two days because of illicit access from the outside.
Shares of the company pared gains to trade down 0.7 per cent in late-afternoon trading.
At a market cap of about $600 billion, Nvidia is the most valuable chipmaker in the US.
It is known for its graphics processing units (GPU) that enhance videogaming experiences and advanced computer simulations.
Agencies contributed to this report
Country-size land deals
US interest in purchasing territory is not as outlandish as it sounds. Here's a look at some big land transactions between nations:
Louisiana Purchase
If Donald Trump is one who aims to broker "a deal of the century", then this was the "deal of the 19th Century". In 1803, the US nearly doubled in size when it bought 2,140,000 square kilometres from France for $15 million.
Florida Purchase Treaty
The US courted Spain for Florida for years. Spain eventually realised its burden in holding on to the territory and in 1819 effectively ceded it to America in a wider border treaty.
Alaska purchase
America's spending spree continued in 1867 when it acquired 1,518,800 km2 of Alaskan land from Russia for $7.2m. Critics panned the government for buying "useless land".
The Philippines
At the end of the Spanish-American War, a provision in the 1898 Treaty of Paris saw Spain surrender the Philippines for a payment of $20 million.
US Virgin Islands
It's not like a US president has never reached a deal with Denmark before. In 1917 the US purchased the Danish West Indies for $25m and renamed them the US Virgin Islands.
Gwadar
The most recent sovereign land purchase was in 1958 when Pakistan bought the southwestern port of Gwadar from Oman for 5.5bn Pakistan rupees.
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