Complex sentence: Subsequently, when Muluzi returned to Malawi from the United Kingdom on May 25 2008, he was arrested at the airport in Lilongwe; he was then flown to Blantyre, placed under house arrest and interrogated.
Split into simpler sentences: Subsequently, when Muluzi returned to Malawi from the United Kingdom on May 25 2008, he was arrested at the airport in Lilongwe. Muluzi was promptly flown to Blantyre, placed under house arrest and interrogated.