Dharamsala, March 12: At least Sixteen Tibetan exiles arrested after they attempted to storm the Chinese Embassy in Nepal's capital earlier this week will remain in jail without trial for 90 days, Nepalese officials have said.

Kathmandu police chief Ganesh Chettri said the sentence was ordered by the chief district officer under the public security act, according to a report by AP.

The detainees were stopped at the gates of the Chinese Embassy's visa office, where they were trying to break in Wednesday, the report said.

Tibetan exiles in Nepal marked the 51st anniversary of the 1959 National Uprising against China's colonial rule over Tibet with protests in Kathmandu despite government attempts to prevent the demonstrations.

A small group of exiles reportedly defied a government ban to gather outside the Chinese embassy's consular section in the Nepalese capital.

Police broke up the protests and detained 34 demonstrators. The remaining 18 were reportedly freed.

Another gathering of about 1,000 Tibetans, including Buddhist monks, nuns and students, was held in Boudha area in Kathmandu, amid tight security.

Police sealed off the area to prevent the Tibetans from protesting elsewhere in the city.

The demonstrators chanted free Tibet slogans and called for greater international efforts against the continued Chinese rule in their homeland.

Tibetans in Nepal have been protesting regularly against China since 2008, after unrests across Tibet were suppressed with violent military crackdown by Chinese Communist authorities.

Acting under heavy Chinese influence, the Nepalese government has lately over intensified its security to prevent Tibetan activists from taking part in peaceful demonstrations.

Those who defied government order were stopped by Nepali police, often using excessive force. The demonstrators regularly faced arrests, intimidation and in some cases individual threats and arbitrary detention.

Earlier this week, Nepal increased security along its northern border and banned protests near the Chinese embassy.

Nepal’s brutal handling of Tibetan protesters had come under intense international criticism and the government had been accused of cracking down on the refugees under Chinese pressure.