UK counterterror police detain two men on suspicion of involvement in terrorism overseas

British police have arrested two men arriving at the busy southern England port of Dover on suspicion of involvement in terrorism overseas, and seized an unspecified quantity of ammunition.

London's Metropolitan Police said Tuesday a 22-year-old and a 29-year-old -- both British citizens -- were arrested a day earlier by Kent police.

It said the pair had arrived at the Dover from Calais, France. They are being questioned at a London police station.

Police said officers seized ammunition and searched a property in east London and two vehicles.

Scotland Yard would not elaborate on the suspected offenses, saying only that the men were arrested on suspicion of "being involved in the commission, preparation or instigation of acts of terrorism."