LONDON - British counter-terrorist police said two men have been arrested in Dewsbury in West Yorkshire on suspicion of a terror plot, British media reported on Tuesday.

The two men, aged 52 and 21 respectively, were arrested on suspicion of being concerned in the commission, preparation or instigation of acts of terrorism under section 41 of the Terrorism Act 2000, according to media reports.

The police announced a "full and thorough investigation" into the reports of letters seeking "to cause fear and offence among our Muslim communities" last month.