Pasting an image on Word app failed, copying its link instead

I am unable to copy an image from internet and paste it on Word documents. When I copy the image, the image's link is copied to clipboard and when I paste it on Word document the link is pasted. Can anyone tell me why am I unable to copy image to clipboard and how can I do so? I'm using Motorola Moto E on Android KitKat 4.4.4 if it matters.