Afghanistan have cancelled proposed home and away cricket fixtures with Pakistan after a deadly bomb attack blamed by the country's intelligence agency on militants allegedly backed by Islamabad.Afghan Cricket Board issued a strongly worded statement late on Wednesday, cancelling the matches in light of a truck bombing in the city's diplomatic quarter that killed at least 90 people.The board said on its Facebook page that no agreement of friendly matches and mutual relationship agreement is possible with a country where terrorists are housed and provided safe havens.