Complex sentence: Sirasa was repeatedly threatened by minister Mervyn Silva, attacked by a petrol bomb on 2.1.2009 and raided by gunmen on 6.1.2009, who set on fire the main control room.
Split into simpler sentences: Sirasa was repeatedly threatened by minister Mervyn Silva. It was attacked by a petrol bomb on 2.1.2009 and subsequently by gunmen on 6.1.2009, who set on fire the main control room.