Image embedded in email also becomes an attachment

A script that is correctly embedding inline images in HTML emails, is also adding the images as attachments. How can I eliminate this second copy of each image?

# Attach Any Images
images = '''/Users/me/Desktop/RKw.jpeg\n/Users/me/Desktop/logo.png'''.splitlines()
I=1
for image in images:
	# print 'Image',i,': ',image,'\n'
	fp = open(image, 'rb')
	msgImage = MIMEImage(fp.read())
	fp.close()
	# Define the image's ID as referenced above
	msgImage.add_header('Content-ID', '<image'+str(i)+'>')
	msg.attach(msgImage)
	I+=1