Many parties including USA, India and others are worried over the plight of civilians. Actualy civilan crisis was triggered by the LTTE. THey have created a barricade forbidding the civilians exit the war zones to safer places. Holding the civilians at gun point they force them to stay as a shield for their carders. In simple words they have created a human shield. Behind this shield they launch attacks to Sri Lankan forces and counter attacks harm civilians.
It’s LTTE who have committed the alleged genocide of Tamils by forcing them to enter an unnecessary war. They launch human wave attacks where they use child soldiers. Recently they sent a child soldier to hamper the civilian rescue by Sri Lankan army.
If you want further proof you could view this video on youtube. It’s captioned in English and you can understand what these IDP is telling to army. Pro LTTE followers might say that this is propaganda, but i hope you have common sense to make a right judgement.