Complex sentence: At 15:15 Eastern European Time (UTC +2), the hi-jacker went to the front of the aircraft and forced his way into the cockpit falsely claiming that he had explosives in his left pocket and demanding that the aircraft continue from Varna to Oslo.
Split into simpler sentences: At 15:15 Eastern European Time (UTC +2), the hi-jacker went to the front of the aircraft and forced his way into the cockpit. There he falsely claimed that he had explosives in his left pocket and demanded that the aircraft continue from Varna to Oslo.