U.S. claimed:

Iranian vessel pointed its weapon at U.S. helicopter

A small Iranian Islamic Revolutionary Guard vessel pointed its weapon at a U.S. military helicopter in the Strait of Hormuz on Saturday, two U.S. defense officials claimed.

News ID: 70586

Date: 29 November 2016 - 15:07

According to MANA, the U.S. officials claimed that the incident took place when a Navy MH-60 helicopter flew within half a mile (0.8 km) of two Iranian vessels in international waters. One of the vessels pointed a weapon at the helicopter.
There was no immediate Iranian comment on the incident. Trump's transition team did not immediately respond to a request for comment.