Thailand's highest-profile opposition party warned of more demonstrations after drawing thousands of people to an anti-government rally Saturday that also protested the prospect of its looming dissolution.

The crowd assembled on an elevated walkway in a Bangkok shopping district three days after the Election Commission said it will petition a court to break up Future Forward for breaching financing rules, a charge the party rejects.

"This is an opportunity for people who are against the current regime to come out and show their power," Future Forward leader Thanathorn Juangroongruangkit, 41, said in a briefing before the rally. At the gathering, he indicated the party will take to the streets next month.