Pelican external image in restructured text

I want put external image on my blog created with Pelican

So i try:

some text

.. image:: http://ift.tt/1h0iPyi
    :alt: Alt text

After running "pelican -s pelicanconf.py" I've got error:

ERROR: Better Fig. Error: image not found: /Users/kendriu/sources/pelican-blog/contenthttp:/example.com/image.png
ERROR: Could not process ./4_joe.rst
   | [Errno 2] No such file or directory: u'/Users/kendriu/sources/pelican-blog/contenthttp:/example.com/image.png'

And no image in my post.

Questions is: How put external images in my blog.