ONS: Net migration increases by 23,000
29 August 2013 Last updated at 19:14 BST
Figures show net migration to the UK rose from 153,000 to 176,000 people in the year ending December 2012.
The increase appears to buck the recent trend of a decline in net migration - the difference between the number of people coming to and leaving the country.
Critics say it is a blow to the government's aim to bring about a drastic cut.
The BBC's Home Editor Mark Easton reports.