The rhino had been part of an ambitious effort to save the subspecies from extinction after decades of decimation by poachers, with the help of the two surviving females.
The premier made no mention of a possible Chinese response in the event U.S. President Donald Trump raises import barriers over trade complaints against Beijing, but other officials say the government is ready to act.
The Austin police chief's direct appeal, complete with promises to listen to the bomber and try to understand the reasons, reflects the stubborn progress of the investigation in which there's no known motivation and the ties between the victims are opaque at best.
Some 80 women, including prominent actresses, have accused the company's former CEO, Harvey Weinstein, of misconduct ranging from rape to harassment.
Police in a Phoenix suburb say one of Uber's self-driving vehicles has struck and killed a pedestrian.