The number of people missing from a language school in the Canterbury Television building which was toppled by Tuesday's earthquake has been revised up to 61.
The directors of the King's Education's English and healthcare schools have been trying to track down more than 100 students known to have been in Christchurch at the time of the earthquake.
The directors say they now believe nine staff and 52 students are missing and presumed to have been in the building when it collapsed.
The group includes 26 students from Japan, 14 from China, seven from the Philippines, three from Thailand, one from Korea and one from the Czech Republic.
The directors say the whereabouts of another 21 students remains unknown.