Germany says Iran's seizure of a British oil tanker and the brief detention of another is an "unjustifiable intrusion" on shipping through a key Persian Gulf route that is increasing tensions in the region.
The president suggested that the USA might once again broaden economic sanctions against Iran.
A picture shows supertanker Grace 1, suspected of carrying Iranian crude oil to Syria in violation of European Union sanctions, after it was detained off the coast of Gibraltar on July 4, 2019.
Britain's Foreign Office said Saturday it summoned Iran's Charge d'Affaires in London, one day after British Foreign Secretary Jeremy Hunt said Tehran "may be choosing a risky path of illegal and destabilizing behavior" and warned Britain's "reaction will be considered but robust".
The company said the ship carried 23 crew members and was in worldwide waters at the time.
No British warship was visible in the video posted by the Guards.
The semi-official Fars news agency quoted Abbas Ali Kadkhodaei, a council spokesman, as saying Saturday that "The rule of reciprocal action is well-known in worldwide law".
Tensions in the Persian Gulf have been on the rise following the tightening of sanctions against Iran's oil exports and global banking last November. The tanker was impounded off Bandar Abbas port for breaking "international maritime rules" after colliding with a fishing boat, Iranian authorities said.
The comments Saturday by the Guardian Council reflect how prominently Britain has featured in the rising USA tensions with Iran.
The Associated Press reported this story.
The US has also called on Iran to release a Panamanian-flagged Riah tanker and 12 of its crew, which was seized by the Revolutionary Guards on Sunday during a naval patrol.
The Guards also seized another "foreign tanker" on Thursday, believed to be the Panamanian-flagged vessel Riah and its crew, and accused the ship of smuggling Iranian fuel.
Hamilton, Schwarzenegger tease R-rated 'Terminator' sequel
I had to go to my deepest sorrows and my places of deepest loss, and that's what makes Sarah Connor, Sarah Connor". He asks Sarah: "Why don't you just let me have her?" And that gives us the opportunity for these new characters.
On Saturday, Algeria's APS news agency said the Mesdar was owned by Algeria's state oil company Sonatrach.
Tensions between the United States and Iran have risen sharply since the U.S. tightened sanctions it reimposed on Iran after unilaterally withdrawing from a landmark 2015 nuclear deal.
The 2015 accord, of which Britain was a signatory, was created to prevent Iran from developing nuclear weapons in return for a lifting of sanctions.
Trump pulled the United States out of the deal previous year and began ratcheting up sanctions against Iran.
"Just spoke to. Zarif and expressed extreme disappointment that having assured me last Saturday Iran wanted to de-escalate situation, they have behaved in the opposite way", he tweeted on Saturday.
"Our action in the Persian Gulf is to uphold int'l rules", he wrote in a tweet on Saturday, calling on Britain to "cease being an accessory" to U.S. sanctions against Iran.
Britain's Foreign Secretary Jeremy Hunt said London's reaction to Friday's tanker seizure would be "considered but robust", and it would ensure the safety of its shipping. "We're not looking at military options, we're looking at a diplomatic way to resolve the situation, but we are very clear that it must be resolved". "Escalation risks a deeper conflict, all sides must show restraint".
In June, Iran shot down an American drone in the same waterway, and Trump came close to retaliating but called off an airstrike at the last moment. "All crew are safe and well", Norbulk said in a statement, following the incident.
Stena Bulk said the ship was "in full compliance with all navigation and global regulations".
Secretary of State Mike Pompeo said Saturday that there are "no indications" that Iran is willing to change its "malign behavior" as the Iranian regime continues to act aggressively on the world stage.
"We are urgently seeking further information and assessing the situation following reports of an incident in the Gulf", a spokesman for Britain's Ministry of Defence said on Friday.