Witnesses say there has been a large explosion at the US embassy building in Beijing, China, with videos and pictures posted to social media showing a large cloud of smoke and what appear to be police vehicles surrounding the area.
Beijing police said the blast was caused by a small homemade explosive device, detonated by a 26-year-old man who hurt only himself.
It comes amid a number of conflicting reports, and after Chinese state media described the incident as "an attempt at self-immolation" and that a woman was in police custody.
A witness told Reuters a Chinese police car appeared to have been damaged in the incident.
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