"We argued that there aren't substantial cases for all four charges, and the procuratorate has partially taken our argument into consideration," said Pu's lawyer, Mo Shaoping.
The Beijing No 2 intermediate people's procuratorate posted the notice on its microblog.
No officials could be reached for comment on Wednesday afternoon in telephone calls to the procuratorate, which is a combined investigation and prosecution office, and to the court.
Liu Zhengqing, who represents another rights lawyer, Tang Jingling, said police told him this week that his client's case had been transferred to the procuratorate.
The scientist, Wang Xuemei, an employee with the Supreme People's Procuratorate, said in a blog post late on Wednesday that the testimonies by Gu Kailai, the woman convicted last month of killing Mr. Heywood, and her longtime aide did not indicate there were any symptoms of death by cyanide.
When it comes to criminal justice, the Ministry of Public Security and Supreme People's Procuratorate are often averse to measures that might limit their powers.
Its article cited remarks by Song Hansong, a director of the corruption prevention department of the Supreme People's Procuratorate.
In a rare admission of the problem, the Supreme People's Procuratorate, which carries out investigations and prosecutions, issued a report in 2003 acknowledging that what it characterized as forced confessions had led to the deaths of 460 people and serious injuries for 117 others.
Ms. Wang, a forensic scientist at the Supreme People's Procuratorate and the deputy secretary general of the Chinese Association of Forensic Medicine, said she doubted that Mr. Heywood had died of cyanide poisoning, as a court ruled in August.
The official, Yu Qiyi, died on Tuesday in Wenzhou, Zhejiang Province, according to the report, which cited the People's Procuratorate of Wenzhou.
Xinhua said the Beijing People's Procuratorate had filed the charges against the railways minister, Liu Zhijun, in a city court.
