“Christopher Allen is the tenth journalist to have been killed in South Sudan since 2012.
The United Nations Mission in South Sudan has expressed its sincere sympathy to the family and friends of US journalist Christopher Allen, killed during fighting in the town of Kaya, near the border with Uganda, in circumstances that remain unclear.
"We would like to pass on our deepest condolences to the family, colleagues, and friends of Christopher Allen for their loss.
"His death while reporting on the conflict in South Sudan is a tragedy," said the Head of UNMISS and Special Representative of the Secretary-General, David Shearer.
"Christopher Allen is the tenth journalist to have been killed in South Sudan since 2012.
"UNMISS has repeatedly stated that any attacks on journalists are unacceptable and it calls on all parties to the ongoing conflict in South Sudan to respect the freedom of the press."
CNN reported that acccording to South Sudan's state broadcaster, Allen was one of 19 people killed during fighting between government troops and rebels in Yei River state.
"Christopher Allen, who worked for various news outlets, was killed in heavy fighting in the town of Kaya," South Sudan Broadcast Corporation said, citing rebels and military officials.