Radial velocity and g − i colour histograms of the intra-cluster regions. Top panel: radial velocity of GCs lying within the rectangular boxes A, C, F, and G (left to right). Middle panel: radial velocity of GCs lying within the streams A, C, F, and G (left to right). The radial velocities of the red GCs are marked in red. Bottom panel: g − i colour histogram of GCs lying within the streams A, C, F, and G (left to right). The dashed vertical black line marks the radial velocity of NGC 1399, and the vertical green lines show the peak positions of the fitted Gaussians. For streams A and C, double Gaussians were fitted.