Election officials in Chad say voters have approved a referendum that would allow President Idriss Deby to run for re-election.

Officials say preliminary results from the June 6 referendum show that about 78 percent of those voting approved a measure to do away with a two-term limit in the constitution. The officials say about 71 percent of eligible voters turned out for the election.

Opposition parties had urged voters to boycott the vote.

President Deby has been in office since 1990 when he seized power in the central African nation. He stood for election in 1996 and again in 2001.

Some information for this report provided by AP and Reuters.