Yemenis have taken to the streets of the capital Sana’a to protest against a possible military strike against Syria.On Friday, the protesters chanted slogans against the United States and some of its allies for threats against Syria. “Arab unity against plans by the West,” the demonstrators shouted as they carried pictures of Syrian President Bashar al-Assad and Hezbollah Secretary General Seyyed Hassan Nasrallah. The call for military action against Syria intensified after foreign-backed opposition forces accused Assad’s government of launching a chemical attack on militant strongholds in the suburbs of Damascus on August 21. Damascus has denied the accusation, saying the deadly attack was a false-flag operation carried out by the militants in a bid to draw in foreign military intervention. Syria has been gripped by deadly unrest since 2011. According to reports, the Western powers and their regional allies -- especially Qatar, Saudi Arabia, and Turkey -- are supporting the militants operating inside Syria. In a statement issued on Tuesday, the United Nations High Commissioner for Refugees said the number of Syrian refugees, who have fled the country’s 29-month-long conflict, reached two million. The UN refugee agency also said some 4.2 million people have also been displaced inside Syria since the beginning of the conflict in the Arab country.