Complex sentence: The plot was foiled after one of the conspirators turned himself into French authorities in February 2016 resulting in arrests of three of the members of the conspiracy on June 2,2016 after several months of further investigation.
Split into simpler sentences: The plot was foiled after one of the conspirators turned himself in to French authorities in February 2016. This resulted in arrests of three of the members of the conspiracy on 2 June, following several months of further investigation.