Thailand was rocked by a fourth day of protests, with demonstrators shutting down the streets of Bangkok to demand democratic reforms to the country’s monarchy and constitution.

Protesters are also demanding the resignation of Prime Minister Prayuth Chan-ocha.

“The government has been pushing us to the cliff and now we have nowhere to go. We need to stand right now; if not now, then we don’t know when,” one person told The Associated Press.

Police in the Thai capital Saturday moved to curb the unrest by limiting public transportation and completely shutting down the city’s Skytrain mass transit system. Authorities used water cannons to break up a rowdy crowd of roughly 1,000 on Friday.

The government has also threatened legal action to anyone organizing protests on Facebook and Twitter, though it has so far not stopped new calls for unrest on Saturday.

Thailand has long held King Maha Vajiralongkorn and other royals are out of bounds for political discussion. Criticism of the monarchs and their families can violate the country’s notorious lese majeste law (insulting the monarchy) — and can earn offenders up to 15 years in jail.