A bomb killed one person in China in an area where thousands of refugees have fled across the Chinese border to escape fighting between Myanmar's government and rebels, state media said on Saturday.
Several other people were injured in the incident on Friday in a remote mountainous region of China's southern Yunnan province, the China Daily said, quoting a Chinese Red Cross official.
The report said the bomb was thrown across the border but gave no other details. AFP calls to government and Chinese Red Cross offices in the area went unanswered.
The fighting between Myanmar's isolated ruling junta and rebel ethnic armies in its remote northeast has driven up to 30,000 refugees into China, the UN said on Friday.
Chinese state media reports have estimated the number of refugees at around 10,000, who had crossed the border at the small town of Nansan.
China issued a rare admonishment to its southern neighbour and close ally, urging it on Friday to resolve the conflict that has broken out in Kokang, a mainly ethnic Chinese region of Myanmar's Shan state.
A battle between the Kokang rebel group and the Myanmar army began on Thursday in violation of a 20-year ceasefire, according to the US Campaign for Burma (USCB), which uses Myanmar's former name.
A female receptionist at the Nanhai Hotel in Nansan told AFP by phone that the hotel was fully booked with "government, security, and medical personnel" but she declined to give further information on the situation there.
China is one of Myanmar's closest allies, its main source of military hardware and a major consumer of its vast natural resources, despite Western concerns over the military-ruled nation's rights record.
China has in the past vetoed UN Security Council resolutions condemning its isolated neighbour. The countries share a 2,200-kilometre (1,370-mile) border.