The three men arrested in the Boston Marathon bombing investigation are to be charged with conspiring to obstruct justice and making false statements, according to a US attorney.
More top news
The peer told Peston on Sunday he needed to have a discussion with his partner of 20 years.
The 10K and half-marathon races take place almost exactly a year after Salman Abedi killed 22 in his attack at an Ariana Grande concert.
Dmitrios Pagourtzis also had several kinds of homemade explosive devices but they were not capable of detonating, county officials said.