Indonesia fires causing smog in Singapore
22 June 2013 Last updated at 13:49 BST
Officials in Singapore say they are exploring whether to charge two Singapore-based companies in connection with severe smog triggered by forest fires in Indonesia.
The companies own land on the Indonesian island of Sumatra.
Correspondents say the fires come from illegal burning in Sumatra that takes place in the dry season to clear space for palm oil plantations.