Ethiopian security forces say they have foiled what they describe as a terrorist plot by a group linked to the country's main opposition party.

A statement released through state media says authorities arrested a group that was planning attacks in the capital, Addis Ababa. The statement says the group planned to target government officials and institutions.

Ethiopian authorities say they also seized bombs, explosives and small arms related to the plot.

The statement did not say how many people were arrested or explain how the alleged group is linked to the opposition Coalition for Unity and Democracy.

Leaders of the party were not available for comment.

Ethiopian Prime Minister Meles Zenawi has repeatedly accused the opposition of conspiring to incite violence and seeking to overthrow him.

The government has charged at least 129 opposition leaders, journalists and others with treason and planning to commit genocide.

Some information for this report was provided by AP and Reuters.