"You (the United States) and your agents are the source of instability in the Middle East ... who created Islamic State?"
Iran repeated accusations that Saudi Arabia funds Islamic militants including Islamic State.
The Iranian boat reportedly came within less than mile of the American ships, before it fired a laser at the helicopter.
Gen. Massoud Jazayeri said Tuesday that Saudi Arabia and the United States "direct and support such acts of terrorism against regional countries", Tasnim news agency reported.
Also, just hours before the deadly attacks by the Islamic State (IS) in Iran's capital Tehran last Wednesday, which killed 17 people, Saudi Foreign Minister Adel Al-Jubeir claimed that Iran was the world's leading supporter of terrorism and must be punished.
On Sunday, Deputy Chief of Staff of the Iranian Armed Forces, Major General Mostafa Izadi, claimed Tehran had obtained "documents and information" that purport to prove that Washington has been directly supporting IS to wage "a proxy warfare in the region".
Fed raises rate, plans balance sheet reduction
United States treasuries were sharply firmer as the market anticipated lower inflationary pressures for the rest of the year. Hong Kong's Hang Seng advanced 0.6 percent to 25,852.10 while the Shanghai Composite Index climbed 0.4 percent to 3,153.74.
Earlier, Iranian Parliamentary Speaker Ali Larijani accused Washington of being an ally of Islamic State in the region.
The deal has failed to normalize relations with the nations. Trump has frequently called the agreement "one of the worst deals ever signed" and said Washington would review it.
"This terrorist act took place a week after a joint meeting between the U.S. president and head of a reactionary regional country [Saudi Arabia] which has been a constant supporter of terrorism", the statement said.
"Some of the problems with the United States are essentially unresolvable as the US's problem with us has nothing to do with nuclear energy or human rights, their problem is with the principle of the Islamic Republic", added the Leader.
Riyadh has denied involvement in the suicide bombings and gun attacks on Iran's parliament and the mausoleum of the Islamic Republic's founder, Ayatollah Ruhollah Khomeini.
At least 41 IS suspects have been arrested since the attacks, according to Alavi, who said Iran has dismantled suspected militant cells with increasing frequency in recent months.
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