This handout from the Royal Thai Government taken and released on August 13, 2020 shows Thailand's Prime Minister Prayut Chan-O-Cha speaking after a cabinet meeting at the Government House in Bangkok on August 13, 2020. (HANDOUT / ROYAL THAI GOVERNMENT / AFP)

BANGKOK - Thai Prime Minister Prayuth Chan-ocha on Wednesday issued his sternest warning yet to protesters seeking his resignation, saying they were creating deeper divisions that could cause the collapse of the country.

Some of those demonstrators have openly called for reforms of the country’s monarchy, a taboo topic in a country with a strict law that punishes perceived royal insults with up to 15 years in prison

“If we want to overcome each other politically, the nation will collapse,” Prayuth told reporters.

“If that happens, just wait, everybody will be on fiery land, engulfed in flames.”

ALSO READ: Thailand says clampdown won't stop as FB plans to fight order

His comments come after a month of near-daily rallies led by students calling for his ouster, a new constitution and fresh election, with some drawing over 10,000 protesters.

Some of those demonstrators have openly called for reforms of the country’s monarchy, a taboo topic in a country with a strict law that punishes perceived royal insults with up to 15 years in prison.

“I am at my wits end,” Prayuth added.

ALSO READ: Thailand's king swears in cabinet, silent on demands for royal reform

Police on Wednesday expanded a crackdown on protest leaders with the arrest of Tattep Ruangprapaikitseree of the Free Youth Group and his partner Panumas Singprom.

Tattep was seen flashing a three-finger “Hunger Games” salute, a symbol of the movement, when he arrived at police station.

Other protesters have vowed to move ahead with a planned demonstration on Sept 19, the anniversary of an earlier military coup in 2006.

Tattep and Panumas were released on bail and deny the charges, according to their lawyer.

ALSO READ: Thailand to arrest activists wanting to curb monarchy powers

The two were among 15 people charged over a July 18 rally for breaching internal security laws and defying an emergency decree, which banned public gatherings to prevent the spread of the coronavirus.

Police on Tuesday arrested human rights lawyer Anon Nampa for the third time over his participation in anti-government protest on similar charges.

Student leaders, rappers and activists have been arrested in recent weeks for participating in demonstrations, some of which have included calls for changes in the king’s role, though none have been charged under the lese majeste law.

READ MORE: Thailand to investigate those behind protests, premier says

Prayuth has said the king had requested no prosecutions under the lese majeste laws for now.

Those arrested so far have all been released on bail.