Riot police forces managed to disperse on Monday protesters camping in front of the Tax Authority headquarters in the Yemeni capital of Sana'a.On Sunday, dozens of businessmen staged an open-ended sit-in protest in front of the Tax Authority HQ demanding that the tax sales law be canceled, corrupt officials be purged, and their confiscated goods be released. Prominent businessmen were at the forefront of protests including, Hassan al-Kabous, the Chamber of Commerce and Industry chief.Police forces used tear gas bombs and fired shots in the sky in an effort to disperse the protesters, leaving at least some businessmen wounded of suffocation, local sources close to the government-owned building told Yemen Post anonymously.The wounded merchants were reported to have been raced to some hospitals in the capital.One merchant participating in the sit-in, Ali al-Hababi, said that the way the security forces dealt with them was barbaric especially given that their demonstrations were conducted in a peaceful, civil manner. "We are not terrorists to treat us like this, we only call for our rightful rights," he added.The Tax Department director, Mohammed Galeb, said on Sunday that groups of armed thugs are surrounding the department's headquarters, calling on security sources to assume its role and break the siege imposed on them.