Thai police say they have uncovered a plot by opponents of the military government involving an armed attack during upcoming events commemorating the country's monarchy.

Police made the allegation at a news conference after showing two arrested suspects who were guarded by heavily armed commandos. Nine persons in total are being sought.

Police declined to give specifics about the alleged plot, but indicated that the plotters were part of the Red Shirt movement loyal to former Prime Minister Thaksin Shinawatra, who was ousted by a military coup in 2006.

The military, which seized power in May last year, is currently facing public criticism because of alleged corruption by senior officers in connection with construction of a park honoring past Thai kings.