In the first incident, two teenagers were killed when their car rammed into a container-truck from behind near Sola over-bridge, said traffic police inspector P R Patel.
They were identified as Chinmay Kanani (18), a class 12th student, and his fried Milan Sharma (18), a diploma engineering student.
"They were returning in Chinmay's car after meeting some friends in Naranpura area early this morning. The car rammed into the container-carrying truck from behind, killing both on the spot," inspector Patel said.