A traveller bound for Singapore has been arrested at the Hong Kong airport for allegedly carrying a knuckleduster in her luggage, according to police. The force said on Sunday that airport security staff found the weapon, which is worn over the knuckles, in the local woman’s carry-on luggage during regular screening the day before. Police arrested the 19-year-old on suspicion of violating the Airport Security Ordinance. She was later released on police bail, pending further...