Shinzo Abe, 67, collapsed and was bleeding from the neck, reports said. (File)
Former Japanese Prime Minister Shinzo Abe was feared dead on Friday after being shot twice at a campaign event in the Nara region. He was "showing no vital signs" when he was taken to hospital, said reports.
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"Former prime minister Shinzo Abe was shot in Nara and I have been informed he is in a very grave condition," said Prime Minister Fumio Kishida. "I pray that former prime minister Abe will survive."
One man, believed to be the shooter, has been taken into custody, chief cabinet secretary Hirokazu Matsuno said. Local media identified the man as 41-year-old Tetsuya Yamagami, citing police sources.
Shinzo Abe had been delivering a speech at an event ahead of Sunday's upper house elections when gunshots were heard, NHK and the Kyodo news agency said.
"He was giving a speech and a man came from behind," a young woman at the scene told NHK. "The first shot sounded like a toy. He didn't fall and there was a large bang. The second shot was more visible, you could see the spark and smoke," she added. "After the second shot, people surrounded him and gave him cardiac massage."
Abe, 67, collapsed and was bleeding from the neck, a source from his ruling Liberal Democratic Party told the Jiji news agency. An official of Abe's faction of the ruling party said he was receiving transfusions, reports said.
NHK and Kyodo both reported Abe was taken to hospital and appeared to be in cardo-respiratory arrest -- a term used in Japan indicating no vital signs, and generally preceding a formal certification of death by a coroner.
Several media outlets reported that he appeared to have been shot from behind, possibly with a shotgun.
The government said a task force had been formed in the wake of the incident and the top government spokesman was expected to speak shortly.
Abe, Japan's longest-serving prime minister, held office in 2006 for one year and again from 2012 to 2020, when he was forced to step down due to the debilitating bowel condition ulcerative colitis.
Japan has some of the world's toughest gun-control laws, and annual deaths from firearms in the country of 125 million people are regularly in single figures. Getting a gun licence is a long and complicated process even for Japanese citizens, who must first get a recommendation from a shooting association and then undergo strict police checks.
With inputs from AFP and Reuters