On Wednesday, thousands of pro-democracy demonstrators gathered at Bangkok’s Ratchaprasong intersection, surrounded the headquarters, and threw paint all over its walls.
The action was a protest against a crackdown by police on Tuesday, when officers fired tear gas and water cannon at demonstrators seeking to rally outside Parliament.
Anucha said the government has to take action under the law to maintain peace in the country, as the protesters have violated the law which may affect the nation, monarchy and people's safety.
"The prime minister hopes that the protesters would use their freedom of expression under the law and express creative opinions," he said.