Pompeo last week accused Iran of attacking oil tankers belonging to Japan and Norway in the Gulf of Oman and pointed to a video of an Iranian patrol boat removing a limpet mine from the hull of the Japanese ship.
US President Donald Trump withdrew the US past year from the 2015 nuclear deal that Iran reached with world powers and recently imposed a series of sanctions now squeezing its beleaguered economy and cutting deeply into its oil exports. On Saturday, Iran summoned the British ambassador to complain about its "unacceptable stance", ISNA news agency reported.
Thursday's attacks, which also hit Norwegian tanker Front Altair, have heightened tensions between Iran and the United States and its Gulf allies after similar blasts in May struck four ships, including two Saudi oil tankers, off the UAE.
On June 12, the day before the latest tanker attacks, an Iran proxy group fired a ballistic missile at a Saudi civilian airport, injuring 26 people.
Tehran rejects the allegation, instead accusing the USA under President Donald Trump of pursuing an "Iranophobic" campaign against it. Tehran has denied involvement in the incident.
Mr Corbyn's comments were echoed by shadow foreign secretary Emily Thornberry, who said U.S. hardliners like national security adviser John Bolton were trying to engineer regime change in Iran.
Saudi Arabia on Saturday joined the United States in blaming Iran for the attacks and called for the global community to take swift action to secure Gulf energy supplies.
Although Iran has denied being behind the explosions, experts believe it could be a response to USA sanctions meant to stop other nations from purchasing Iranian oil.
As US-Iranian tensions soared, Trump dismissed Tehran's repeated threats that in case of conflict it could block the Hormuz Strait - a narrow seaway vital to the world's oil supplies.
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The United States has also blamed Iran for attacks on its oil tankers.
"Our crew remain on board the Kokuka Courageous". "One of the necessary steps would be to verify the intelligence that the U.S. allegedly has at its disposal, for other countries to assess whether Iran was actually behind it or not - not just for this particular incident but also for the previous ones that we have seen over the past few months", she told AFP.
"First inspections are under way and no hot spots have been identified following the fire", the vessel's owners said in a statement Sunday.
The killing strained Saudi Arabia's relations with the West and led to some demands for Europe and the U.S.to cut arms exports to the Gulf kingdom.
The attacks have raised fears of broader confrontation in the region where the United States has boosted its military presence over perceived Iranian threats.
The Saudi Energy Ministry quoted Minister Khalid al-Falih on Saturday as saying "a rapid and decisive response" was needed to the recent attacks.
"Same thing happened at our bilateral meetings", he said, referring to talks with officials from several countries including Saudi Arabia and the United States.
"The suspicious actions against the tankers. seem to complement the economic sanctions against Iran, considering that (the U.S.) has not achieved any results from them", he told MPs.
The US also blamed Iran for the attacks, while citing little direct evidence.