Kevin Pietersen said in his apology, "I truly didn't mean to cause upset or tension particularly with important games at stake".
The England batsman was dropped for the final test against South Africa - which begins tomorrow - after it came to light that he had sent derogatory texts to the rival team.
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The well-respected foreign policy hawk enjoyed his greatest successes as national security adviser to President Jimmy Carter.
Police have arrested two men aged 20 and 22 on suspicion of terror offences, bringing the number of people are now in custody to 11.
Among those attending the Soundgarden and Audioslave singer's funeral were Brad Pitt, Pharrell and Christian Bale.