I would guess that there are 100's of wooden boats in that area, so they could have been at any dock, without notice, until needed.
You can bet they are stolen.
Iran has its fingers all over the trouble in Iraq, so yes, they could have come from Iran, you can bet that in the least, Iran sent money for loading them.
Now for a break and a smile, take time to meet "PFC Hammer".
http://www.freerepublic.com/focus/f-news/1123853/posts
We need to be reminded at times that there is still a God, who pulls strings, for even the smallest of his creatures.