An activist opposed to military rule in Thailand says his car was set on fire and gutted early Monday, just hours after he attended a rally protesting the Election Commission's alleged mismanagement of the March 24 general election.

Ekachai Hongkangwan has been the repeated target of physical and legal attacks, including a previous one on his car that did less damage. On March 5, he was attacked by two men on a motorcycle who tried to beat him with a wooden stick and a metal pipe.

Before his car was torched, Ekachai had joined fellow activists at a rally to gather signatures for the impeachment of Election Commission members. The rally was the first since the election, whose results are to be officially confirmed on May 9.