Images of the crust and mantle beneath northeast India obtained by 2D migration of ~1000 broadband P-receiver functions clearly trace a northward dipping Moho from the Himalayan foredeep reaching depths up to 50 km further north beneath the Himalayan convergence zone. Also, these images reveal presence of largely coherent 410-km and 660-km discontinuities that conform to the IASP91 model. Marginal variations in the depth of the 410-km interface are observed, that appear region specific. The thickness of the mantle transition zone does not deviate significantly from a global average of ~250 km. Interestingly, our results reveal consistent presence of a signal from an interface around 300 km. Origin of such a boundary, known as X-discontinuity and unrelated to the Lehmann discontinuity, is discussed. Possible presence of the X-discontinuity from the Indian region is reported here for the first time.