Tribal fighters took control of a top Yemeni city on Tuesday, a setback for an embattled government whose wounded president is hospitalized in Saudi Arabia. More than 400 tribal gunmen took over Taiz in southwest Yemen, witnesses there said. Government forces have been regrouping in an effort to re-enter the city. Yemen's government has faced international criticism for excessive use of force against anti-regime protesters and the deaths of anti-government demonstrators in Taiz. Are you in Yemen ? Share your photos and videos from the scene, but please stay safe. Meanwhile, President Ali Abdullah Saleh was in Saudi Arabia Tuesday, recovering from burns over 40 % of his body and a collapsed lung, a U.S. government official briefed on the matter said. Whether he will return to Yemen remained uncertain. Saleh was wounded Friday in an attack at his presidential compound. An Arab diplomatic source with knowledge of Saleh's condition said one shrapnel wound was 7 centimeters -LRB- 2.75 inches -RRB- deep. Fighting between government and tribal forces has been raging in the capital of Sanaa, where thousands of anti-government protesters have been pressuring Saleh to give up power since January. And there has been unrest elsewhere. At least 15 people were killed in Abyan Monday night and Tuesday morning in clashes between Islamic militants and security forces, according to a security