London, England (CNN) -- The United Kingdom on Thursday dismissed Iran's claim that the latter has arrested four terrorists linked to Britain.
"There is a long history of baseless Iranian allegations against the UK. This is just the latest," said the British Foreign Office.
"The UK does not support or encourage terrorist activity in Iran, or anywhere else in the world, and this claim will be seen as what it is: another in a long line of slurs against the United Kingdom from the Government of Iran."
Tehran claims the arrests were made in the western city of Marivan and the suspects had carried out five assassinations in the last two years.
Iran said the men were paid thousands of dollars for the killings and they were taking their orders from Jalil Fattahi, who lives in the United Kingdom and is one of the commanders of a Kurdish rebel faction, Komala.
Kurds live in a contiguous region across Iraq, Iran, Turkey, and Syria, and those governments long have been on guard against Kurdish separatist militants.
CNN's Jonathan Wald and John Dear contributed to this report.