<sod >BurmaÂ has been laying landmines across a section of its border with Bangladesh, said two government sources in Dhaka, adding that the purpose may have been to prevent the return of Rohingya Muslims fleeing violence.< eod>< sod > BurmaÂ has been laying landmines across a section of its border with Bangladesh, Dhaka has said, with government sources adding that the purpose may have been to prevent the return of Rohingya Muslims fleeing violence.< eod>