This is reported on the website of the President of Ukraine.
"President of Ukraine Petro Poroshenko had a telephone conversation with US Secretary of State Michael Pompeo," the report said.
It is also noted that the Ukrainian president informed the State Department about the incident in the Kerch Strait and the "relevant steps" of Kiev, "in particular the introduction of martial law."
Earlier, Pompeo called on Russia and Ukraine to "show restraint" against the background of the incident in the Kerch Strait.
On November 25, the FSB announced that three Ukrainian ships had illegally crossed the Russian border, after which they were detained.
On November 26, the Verkhovna Rada voted to impose martial law for 30 days in a number of Ukrainian regions.