As many as 33 trains have been cancelled and six others rescheduled till Monday morning after two trains collided in Andhra Pradesh's Vizianagaram that killed 13 so far, according to East Coast Railway officials. Chennai Central to Puri (22860), Raigada to Guntur (17244) and Visakhapatnam to Guntur (17240) have been cancelled. Meanwhile, Chennai Central to Shalimar (12842) and Alleppey to Dhanbad (13352) have been rescheduled.