<sod >As investigators started to question Sayfullo Habibullaevic Saipov, officials were seeking for clues to how the man who moved to the US in 2010 became radicalised.< eod>< sod > As investigators started to question Sayfullo Habibullaevic Saipov,Â who is recovering in hospital after being shot by a police officer, officials were seeking for clues to how the man who moved to the US in 2010 became radicalised.< eod>