The four were later released on bail pending their appeal against the ruling.

The four were among 15 people tried for contempt of court and violating the court power when the court made the ruling on the case against the Election Commission on July 25.

The three persons, who got one month jail term, were Thitirat Surattanakulchai, 51, Renu Jitprasarn, 53, and Mali Netkham, 40.

The court reasoned that the three used impolite words to attack the court within the court's compound as if they were hired to do so. As a result, the court declined to suspend the jail term.

Sathien Wipromsiri, leader of a pro-Thaksin group who is an assistant professor of the Mahamakut Buddhist Monk Uiversity, was sentenced to three months in jail.

The court ruled that Sathien apparently incited the people to carryout an unrest and show contempt of court.

Former Chat Thai Party MP Chuwit Kamolvisit escaped the jail term. The court put him on probation for one year without giving him a sentence.

Six other people were also put on probation for one year after expressing their remorse and begging for courts mercy. The court did not hand down sentence on them.

The six were identified as Lawal Suthichaisiri, Walaiporn Phanbuppha, 50, Thammaros Sunthornpol, 49, Yutthana Chaisinson, 34, Wanna Maisithong, 62, and Thananan Prathomsao, 45.

The four remaining person received suspended jail term.

The four were identified as Somchai Radthuay, 34, Sermsak Ekkarat, 64, Somyos Kuangpatra and Suchada Ruamsilp.

The four were initially sentenced to one month in jail and a fine of Bt500 each, but the court commuted the jail term and put them on probation for one year.

The Nation