Ethiopia's spy agency says that security forces have arrested 15 people alleged to be members of a terror cell linked with al-Qaida.

The spy agency says military training manuals, videos and weapons were seized from the suspects. The agency announced the arrests late Wednesday.

Authorities said the suspects were trained by al-Shabab militants in neighboring Somalia and Kenya. They alleged the group was planning to launch attacks based in Ethiopia's Somali and Harara regions.

On Tuesday the country's federal high court convicted 10 people on similar terror charges.