BGB personnel intercepted the trespassers at three different points of the Naf river on Sunday.
Teknaf 2 BGB Commander Lt Col Abujar Al Zahid said: “We raided different points of the river from 5am till 9am and pushed back at least 400 Rohingyas boarded on 34 boats.”
A total of 184 boats were sent back from Naf river so far till December.
Hundreds of Rohingya Muslims tried to cross into Bangladesh illegally after Myanmar troops launched a crackdown in the Rakhine state in response to attacks on three border posts on October 9 that killed nine police officers.
Bangladesh has stepped up security along its border with Myanmar to prevent influx of Rohingyas fleeing violence in the Rakhine state that has killed at least 86 people and displaced 30,000 others.
Myanmar and the military have denied accusations by Rohingyas and rights groups of raping women, torching houses and killing civilians during their operations.
Myanmar does not recognise the Rohingyas as its citizens and dubs them ‘Bangali’. Rohingyas, who managed to land in Bangladesh, have taken shelter in refugee camps and other places in Cox’s Bazar.
The latest violence is the most serious since the 2012 communal clashes. Many have criticised Nobel Peace Prize winner Aung San Suu Kyi for her silence although her party is in power.