New York

SEVERAL US states are investigating a massive cyberattack on No 2 US health insurer Anthem Inc that a person familiar with the matter said is being examined for possible ties to China.

Anthem disclosed the attack late on Wednesday, saying that unknown hackers had penetrated a database with some 80 million records. The insurer said that it suspected that they had stolen information belonging to tens of millions of current and former customers as well as employees.