Thailand's anti-corruption body has recommended impeaching 250 former parliament members in the latest moves aimed at supporters of former Prime Minister Thaksin Shinawatra.

National Anti-Corruption Commission spokesman Vicha Mahakun said Thursday the agency found the lawmakers had misused their authority in violation of the now-defunct constitution by seeking an amendment to make the Senate fully rather than partly elected.

The Constitutional Court ruled in 2013 that the move to change the composition of the 150-member Senate was unlawful.

Vicha said the agency will submit its evidence to the interim National Legislative Assembly, appointed after a military coup last year. A vote for impeachment could ban the former lawmakers from political office for five years.