Agartala/Guwahati, July 20 (IANS): The India-Bangladesh border would remain open for 24 hours to facilitate the students and other people of India and other countries to enter from the trouble-torn neighbouring country, where the situation remains extremely volatile due to the protests on quota issue for the last three weeks.

According to BSF sources, over 600 students from India, Nepal, and Bhutan along with some stranded tourists from trouble torn Bangladesh returned to India on Saturday through the checkposts of Tripura, Assam and Meghalaya along the border with the neighbouring country.

Over 600 students, mostly Indian, returned to India on Friday through the Tripura, Assam and Meghalaya borders.

"The students of India and other countries are mainly coming from Dhaka, Comilla and Brahmanbaria. The Indian students belong to northeastern states, Uttar Pradesh, Punjab, Haryana, West Bengal and Jammu and Kashmir," the BSF spokesman said.

Five Indian states -- West Bengal (2,216 km), Tripura (856 km), Meghalaya (443 km), Mizoram (318 km) and Assam (263 km) share a 4,096-km border with Bangladesh.

Officials from the state governments of northeastern states along with police and BSF officials are camping in the various checkposts in Tripura, Assam and Meghalaya to receive the students and other people from Bangladesh.

The High Commission in Dhaka and the Assistant High Commissions in Chittagong, Rajshahi, Sylhet and Khulna are available on helpline numbers for any assistance required by the Indian nationals.

External Affairs Ministry spokesperson Randhir Jaiswal said in Delhi that around 15,000 Indian nationals, including 8,500 students, reside in Bangladesh.

He said that External Affairs Minister S. Jaishankar is monitoring the situation, while the High Commission in Dhaka will provide regular updates on the situation there.

Meanwhile, the External Affairs Ministry has urged Indian nationals in Bangladesh to follow the advisory issued by the High Commission in Dhaka and to be in touch with the High Commission.

Bangladesh has announced the imposition of a curfew and the deployment of military forces after police failed to quell days of deadly unrest that has spread throughout the country.

Violence erupted in the country after protests by students demanding reforms in the quota system for government jobs.

The clashes between student demonstrators and police have killed at least 105 people so far.