Two Britons suspected of carrying guns and ammunition have been arrested in Greece near its border with Turkey.
A senior Greek security source said the two Iraq-born British nationals, both in their 20s, were arrested on Saturday night by coastguard officers in the port city of Alexandroupolis.
They were said to be driving a trailer and carrying more than a dozen guns and 20,000 bullets, the official said.
Greek police counter-terrorism officers and National Intelligence Agency staff were dispatched to Alexandroupolis, in the north east of the country.
The Foreign Office said it was investigating the reports.
A spokesman said: "We are urgently looking into reports that two British nationals have been detained in Greece."