Freeway

The blaze was caused by an oil tanker on fire under the bridge according to local officials.

The partial collapse of the busy elevated freeway affected four lanes. Local media reported the fire started at 07:00 local time (11:00 GMT) when traffic was light. No injures have been reported so far.

The north-south highway is one of the busiest in the United States, connecting Maine to Florida and major cities along the East Coast. It remains closed in both directions in the Philadelphia area, officials said.

Houston Independent School District released a statement saying a female student died at the scene Tuesday, while another girl died at a hospital.

Houston police spokesman Victor Senties says a car may have hit the bus after swerving to avoid another vehicle, causing the bus driver to overcorrect and go over the overpass. Senties says the investigation is ongoing.

Names and ages of the victims weren't immediately released. The district says the bus driver and two other students are seriously hurt.