Jailed former Thai prime minister Thaksin Shinawatra is to be freed, the kingdom’s justice minister has said, possibly as soon as the weekend – just six months after returning from 15 years of self-imposed exile. The controversial billionaire, twice elected premier and ousted in a 2006 military coup, was jailed for eight years on graft and abuse of power charges in August, but within days had his sentence cut to one year by King Maha Vajiralongkorn. Justice minister Tawee Sodsong said on Tuesday that the former Manchester City owner, 74, would be among 930 prisoners granted early release. “He is in the group where they are in a critical condition or aged over 70. He will be released after six months automatically,” Tawee Sodsong told reporters. Thaksin was jailed on 22 August last year, and Thai media reported that his release could come any day from Saturday. The exact details of his release are not clear, but he may be subject to monitoring – possibly with an ankle tag – and restrictions on his right to travel. His homecoming coincided with his Pheu Thai party returning to government in alliance with pro-military parties, leading many to conclude that an agreement had been struck to cut his jail time. The rumours grew stronger when he was transferred to a police hospital within hours of being sentenced because of his poor health, and it is not clear that he has spent any time in a prison cell. Local media reported Thaksin had been suffering from chest tightness and high blood pressure when he was admitted to hospital, and in the following months, his family said he had undergone two operations. The former telecoms tycoon is one of the most influential but divisive figures in modern Thai history. Loved by millions of rural Thais for his populist policies in the early 2000s, Thaksin is reviled by the country’s royalist and pro-military establishment. Much of Thai politics over the last two decades has been coloured by the tussle for power between the establishment and Thaksin and his allies. When he landed home in Bangkok, his supporters gave him a hero’s welcome, and his first public act was to prostrate himself in homage before a portrait of the king at the airport. Last week, police laid lese-majesty charges against him over comments he made in South Korea almost a decade ago, though it is not clear whether prosecutors will take the case to court. Thaksin denies the charge and has written to the attorney general asking for fair treatment.