South Korean police are investigating whether a North Korean hacker group, accused of stealing data from 14 entities, obtained information on defence technology including an anti-aircraft laser, a Seoul city police official said on Wednesday. The probe, which is being carried out in conjunction with the U.S. Federal Bureau of Investigation (FBI), is trying to determine the extent of the data obtained by the group known as Andariel, Jeong Jin-ho, who heads a team at the Seoul Metropolitan Police Agency investigating the case, told Reuters.