Israel dropped special forces on a Turkish convoy en route to the Gaza strip last week. They said it was to prevent a weapon shipment, although the ships were loaded with humanitarian relieve goods.
Iran is going to send a convoy to Gaza now, and is claiming to protect it with its navy until they arrive. The Iranian navy usually doesn't operate outside the Persian Gulf region due to the heavy US Navy presence there.
So, is this going to escalate into something bigger or is it just some cage rattling by a frustrated iranian commander?