Strayed into Iranian waters? Or did the Iranians come out and grab them? All without a trace of communication?
I tend to believe the Iranians just came out and grabbed them, from Iraqi waters. That's just a personal opinion, though, but they tried the same thing during the first gulf war but all it ended up with was a boatload of dead iranians (can't get into details however. That little "classified" thingie...).
They have a history of this type of behaviour.
Kinda hard to figure out where the borders are at sea in small patrol boats.
I posted articles earlier this week about Iran in boat attacks on her neighbors.