Heavy weapons 
 
 Gunfire - including the sporadic firing of heavy weapons - resumed in the early hours of Tuesday and was still audible at 9am (0600 GMT). Officials at the United Nations are "extremely concerned" about the violence, Araud said, due to the high number of casualties and because the fighting appears to be between different ethnic groups in South Sudan.  The U.S. Department of State warns U.S. citizens against all travel to the Republic of South Sudan and recommends that U.S. citizens currently in South Sudan depart immediately. Civilians take refuge 
 
 The UN deputy special representative for South Sudan, Toby Lanzer, told Al Jazeera on Tuesday that about 16,000 civilians were now taking refuge from the fighting in two UN compounds. Fresh clashes have broken out in the South Sudanese capital Juba, and at least 66 soldiers have been killed, a day after President Salva Kiir said security forces had put down an attempted coup by supporters of his former deputy. Kiir had said in a statement on Monday that security forces had regained control, although a dawn-to-dusk curfew had been imposed. Ten people were arrested in connection with the foiled coup, according to a statement posted Tuesday on the South Sudan government website. The men belong to different ethnic groups - Kiir to the Dinka, the most powerful, and Machar to the Nuer, but it is not clear whether this latest tension is due to ethnic or political divisions. South Sudan's government has struggled to create a functioning state since it declared independence from Sudan in 2011 after years conflict with Khartoum during a war that often saw south-south clashes. Residents near Juba airport, which has been closed since Monday, were woken before dawn by gunshots and blasts, a UN worker said. The State Department said U.S. citizens currently in South Sudan should leave immediately, and it ordered the departure of non-emergency U.S. government personnel from the country. "The Embassy is also suspending normal operations until further notice and cannot provide routine consular services to U.S. citizens in South Sudan," it said.
– The State Department today issued a travel warning for South Sudan, recommending that all Americans "depart immediately," as violence rises in the wake of an attempted coup. That includes non-emergency US personnel, who have already been ordered to depart, forcing the US to suspend normal operations at its embassy there until further notice. At least 66 soldiers have been killed so far in clashes in Juba, the capital of the world's newest country, al-Jazeera reports. Gunshots rang out within earshot of the embassy, and military vehicles roamed the mostly empty streets as residents barricaded themselves inside. The UN says that roughly 10,000 people have sought refuge at the two UN compounds there, according to CNN, and hospitals are straining to deal with an influx of patients.