MOSCOW, June 5 (Reuters) - The English Court of Appeal

has refused jailed Russian tycoon Ziyavudin Magomedov permission

to appeal against a decision that threw out his $14 billion

lawsuit against Russian oil pipeline monopoly Transneft and

other firms, the company said.

Magomedov sued the company and several others at London's

High Court, alleging his 2018 arrest on embezzlement charges

prompted a Russian state-supported scheme to strip him of his

holdings in valuable port operators.

In January, Transneft, as well as U.S. private equity firm

TPG and other companies, won their bid to block

Magomedov's London lawsuit.

Transneft said late on Wednesday that the English Court of

Appeal denied Magomedov permission to appeal the ruling.

"It is clear from the English process that there are massive

losses which Mr Magomedov has suffered as a result of wrongdoing

against him. He will continue to seek justice and a fair outcome

wherever he can," a spokesperson for Magomedov said.

Magomedov once controlled an empire ranging from port

logistics to oil and gas through his Summa Group conglomerate,

which he founded with his brother Magomed.

But the brothers were arrested on embezzlement and organised

crime charges in one of the most high-profile prosecutions of

its kind in years.

Magomedov was sentenced to 19 years in jail in 2022. He says

the charges against him are unfounded and unsuccessfully

appealed against his conviction.