A NATO air raid hit the Chinese embassy in Belgrade late yesterday, and China said four people had been injured and four were missing.
Earlier, the Yugoslav Minister without Portfolio, Mr Goran Matic, told reporters outside the embassy that 26 Chinese had been taken to hospital, and four had been detained.
"They're crazy, those NATO pilots," he said, adding that there were 30 people in the building when the blast happened.
In Beijing, China's official Xinhua news agency said three NATO missiles had hit one embassy building. It said that apart from the four injured four people were unaccounted for.
Eyewitnesses said NATO might have been targeting the BK TV building 500 metres away. BK TV is owned by Mr Bogoljub Karic, a businessman close to Yugoslav President Slobodan Milovesic.
"That seems to be the only logical target in the area," said one woman on the scene.
At least three ambulances and four fire engines were outside the embassy, a large white marble building standing in its own grounds behind iron gates .
Thick smoke was coming from one part of the building and many windows were smashed.
The Yugoslav Beta news agency said: "NATO aircraft hit the Chinese embassy building in New Belgrade shortly before midnight."
"The embassy was hit as four strong detonations were heard," the agency said. "Explosions were heard in the wider Belgrade region and in New Belgrade."
A Chinese diplomat on the scene said that around 20 people lived in the building. "This is a criminal act, they can see this is a completely residential area," he added.
Serbian state television (RTS) showed people being helped down a fire ladder from windows of a white five-storey building.
Yugoslav Federal Foreign Minister, Mr Zivadin Jovanovic, described the raid as an attack on diplomacy. "There is no rational explanation for this," Mr Jovanovic told RTS from the scene of the attack.
"This is the territory of the People's Republic of China. It is a strike on diplomacy which is the only way to solve the crisis and this means that such a way is not good for those who perpetrated this attack."
The embassy was purpose-built for the Chinese two or three years ago, officials said.
Yugoslavia's official news agency Tanjug said the Federal Interior and Defence Ministries were also hit just before midnight but gave no details of any casualties.
It said three more blasts were heard at 1:50 a.m. (2350 GMT Friday).
The blasts came hours after Belgrade was plunged into darkness, with the NATO raids ending a three-day pause from bombing on the city.
One resident in central Belgrade said smoke was coming from a Yugoslav army building, which had not been hit in previous NATO strikes.