The United Nations (UN) on Monday called the people of Thailand anew to conduct dialogue and end the worsening violence that has gripped the Southeast Asian nation.

In a statement, the UN said UN Secretary General Ban Ki-moon is monitoring the situation in Thailand, adding that he is  “saddened” by reports of casualties as a result of the latest clashes between protesters and Thai military.

Ban appealed to both parties to “do all within their power to avoid further violence and loss of life” and encouraged them to  urgently return to dialogue in a bid to decrease the mounting tension and resolve the matter amicably.

The Philippine Department of Foreign Affairs (DFA) issued a travel advisory over the weekend for Filipinos not to travel to Thailand’s capital of Bangkok due to the worsening situation, citing the increased incidence of violence in the area.

Reports revealed that at least 33 people were killed and 239 others were wounded as of Sunday in the latest clash which started last week. Prime Minister Abhisit Vejjajiva had already suspended the school opening for a week as 10 schools are located in  the clash site.

Prior to the recent clash that started Thursday, the two-month crisis in the streets of central Bangkok had reportedly killed 29 people and wounded 1,400 people, based on the website of msnbc.

It added that it is the deadliest political crisis in Thailand in 18 years. The last political crisis in Thailand was in 1992 and only  ended when King Bhumibol Adulyadej chastised both military and protest leaders.

This time, however, the King has not yet issued any statement regarding the political violence.