Sentences have been handed down so far to 55 people involved in a March 14 anti-China riot in Tibet's capital Lhasa, state media reported Tuesday, quoting a senior Tibetan official.

Baema Cewang, vice-chairman of the regional government, reportedly disclosed the figure during a meeting with Michael Andrew Johnson, a visiting member of the Australian House of Representatives, Xinhua news agency said.

Following the violence police detained 1,317 people, of whom 1,115 were subsequently released, the report said, with the rest standing trial.

Xinhua also quoted "previous reports" that 30 people had been convicted of arson, robbery, disrupting public order and attacking government offices, among other crimes, as of April 29.

Their sentences ranged from three years to life, it said.

Anti-China unrest erupted in Lhasa on March 14 and spread to Tibetan-populated regions around the country.

Tibet's government-in-exile said more than 200 Tibetans were killed and about 1,000 hurt in a subsequent Chinese crackdown, figures disputed by Beijing.